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MAR
10
Today
Condensed-Matter Physics & Materials Science Seminar
"Computational Materials Discovery: New Developments and Surprising Discoveries"
Presented by Artem Oganov, Stony Brook University
11 am, Bldg. 734, ISB Seminar Room 201 (upstairs)
Monday, March 10, 2014, 11:00 am
Hosted by: Weiguo Yin
Thanks to powerful evolutionary algorithms, in particular to the USPEX method [1-3], it is now possible to predict both the stable compounds and their crystal structures at arbitrary P,T-conditions, given just the set of chemical elements. Recent developments include the extension of this algorithm to molecular crystals [4] (which allowed large structures to be handled easily, leading to revision of high-pressure structures of Mg(BH4)2 [5], proving earlier proposed "experimental" structure to be incorrect) and a new technique called evolutionary metadynamics [6]. Some of the results that I will discuss include: 1. Theoretical and experimental evidence for a new stable high-pressure phase of boron, γ-B [7], showing superhardness and charge transfer between boron atoms. 2. New insulating and optically transparent, and experimentally confirmed, form of sodium [8]. 3. Establishment of the structure of a carbon allotrope - M-carbon [1,9]. 4. Predicted reactivity of noble gases under moderate pressures - Xe [10] and even He. 5. Predicted stability of "impossible" chemical compounds - such as Na3Cl, Na2Cl, Na3Cl2, NaCl3, NaCl7 [11], Mg3O2 and MgO2 [12]. These compounds become stable under pressure and we already have compelling experimental evidence for some of them [11]. References [1] Oganov A.R., Glass C.W., J.Chem.Phys. 124, 244704 (2006). [2] Oganov A.R., Lyakhov A.O., Valle M., Acc. Chem. Res. 44, 227-237 (2011). [3] Lyakhov A.O., Oganov A.R., Stokes H.T., Zhu Q., Comp. Phys. Comm. 184, 1172-1182 (2013). [4] Zhu Q., Oganov A.R., Glass C.W., Stokes H.T., Acta Cryst. B68, 215-226 (2012). [5] Zhou X.-F., Oganov A.R., Qian G.R., Zhu Q., Phys. Rev. Lett. 109, 245503 (2012). [6] Zhu Q., Oganov A.R., Lyakhov A.O., Cryst.Eng.Comm. 14, 3596-3601 (2012). [7] Oganov A.R., Chen J., Gatti C., et al., Nature 457, 863 (
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MAR
10
Today
Condensed-Matter Physics & Materials Science Seminar
"Spin liquid close to a magnetic quantum critical point in Na4Ir308"
Presented by Yogesh Singh, Indian Institute of Science Education and Research, India
1:30 pm, Bldg. 734, ISB Conf. Rm. 201 (upstairs)
Monday, March 10, 2014, 1:30 pm
Hosted by: John P. Hill
Na4Ir3O8 is a frustrated magnet with S = 1/2 moments on the hyperkagome lattice [1]. We present our recent bulk thermodynamic measurements of magnetic susceptibility (T ≥ 1.8 K) and heat capacity (T ≥ 0.5 K), thermal transport measurements (T ≥ 75 mK), and magnetic Grüneisen parameter measurements (T ≥ 0.3 K, H ≤ 2 T) to show that Na4Ir3O8 is a strongly frustrated quantum magnet with no long range order down to the lowest temperatures measured. The magnetic Grüneisen parameter divergences as T→ 0 K and scaling behavior indicates that Na4Ir3O8 is close to a zero-field quantum critical point (QCP) [2]. We will also present the first microscopic SR and 23Na NMR measurements down to 5 K to support claims of a spin-liquid state. To search for a nearby magnetic state we have also studied polycrystals of Na4±Ir3O8 with ≤ 10%. The Na-deficient samples show evidence of both local and itinerant electrons while the magnetic susceptibility of Na-excess samples show a magnetic anomaly below 13 K suggesting that stoichiometric Na4Ir3O8 is close to a magnetic ground state. Low temperature SR measurements (T ≥ 30 mK) support indications of a close by magnetic state in Na4Ir3O8. These results strongly suggest that Na4Ir3O8 is a spin-liquid material situated close to a magnetic quantum critical point. [1] Y. Okamoto, M. Nohara, H. Aruga-Katori, and H. Takagi, Phys. Rev. Lett. 99, 137207 (2007). [2] Yogesh Singh, Y. Tokiwa, J. Dong, and P. Gegenwart, Phys. Rev. B 88, 220413 (2013)
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MAR
10
Today
Center for Functional Nanomaterials Seminar
"Insights on liquid systems and DNA repair from computational simulations"
Presented by G. Andrés Cisneros, Department of Chemistry, Wayne State University, Detroit, MI
2 pm, CFN, Building 735 Conf. Rm. B
Monday, March 10, 2014, 2:00 pm
Hosted by: Qin Wu
Center for Functional Nanomaterials Seminar G. Andrés Cisneros Insights on liquid systems and DNA repair from computational simulations Department of Chemistry, Wayne State University, Detroit, MI Monday, March 10, 2014 2:00 p.m. bldg.. 735 ��" Conf. Rm. B Two topics related to development and applications of computational simulations will be presented. We have developed a novel force field that combines terms from two advanced potentials. The Coulomb and exchange repulsion are calculated using fitted electronic den-sities based on a force field developed by us called the Gaussian Electrostatic Model (GEM). These terms are coupled to the polarization, van der Waals and bonded terms from AMOEBA The required electronic integrals are calculated by means of reciprocal space methods to in-crease computational speed. We will present the details of our method, which we term GEM*, its implementation and performance for molecular dynamics simulations and its re-cent application to liquid water simulations as well as the development of AMOEBA for ionic liquids. The second topic involves the use of simulations to investigate DNA repair enzymes. Replication and repair of DNA are critical processes. Errors in either of these transactions can result in mutations, some of which can lead to disease or even death. Results will be presented on simulations of the rate limiting step of the reaction catalyzed by E. coli AlkB. AlkB is a DNA repair enzyme that catalyzes the oxidative de��"alkylation of DNA by means of a non��"heme iron using α��"keto glutarate and O2 as co��"factors.. Host: Qin Wu Joann Tesoriero Center for Functional Nanomaterials Bldg. 735 Upton, NY 11973 Tel: (631) 344-7791 Fax: (631) 344-7769 Tesorier
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MAR
11
Tuesday
Center for Functional Nanomaterials Seminar
"Smarter Lithography: Top-Down Control of Nanometer-Length-Scale Self-Assembly"
Presented by Karl Berggren
11 am, CFN, Building 735, Seminar Room, 2nd fl.
Tuesday, March 11, 2014, 11:00 am
Hosted by: Mark Hybertsen and the CFN Users' Executive Co
Coffee and cookies at 10:45 am Center for Functional Nanomaterials Colloquium: Distinguished CFN User Karl Berggren Smarter Lithography: Top-Down Control of Nanometer-Length-Scale Self-Assembly Tuesday, March 11, 2014 11:00 a.m. Seminar Room, 2nd Fl. The future of nanotechnology generally and the integrated circuit industry in particular depend on the ability to control and pattern complex structures at the nanometer length scale. We will discuss methods we have developed that use electron and ion beams to pattern structures at the single-nanometer length scale. However, covering large areas with nanometer-scale beams is a slow and expensive process, leading some to suggest that chemical and biological self-assembly might better address the future industrial needs in this area. The question is then, how to control self-assembly to create the kinds of flawless and arbitrary patterns the semiconductor industry now uses routinely in the fabrication of microchips? We will discuss a solution to this problem in which we pattern only a sparse structure and then use directed self-assembly of block copolymers to fill in the remaining space. The trick is to achieve a maximum of control and complexity in the final pattern with a minimum of expensive top-down lithography. The result is a surprising degree of control and perfection in patterning systems that would otherwise produce random patterns. We can even control double-layer patterns by using just a single layer of sparse electron-beam-defined posts. The methods take advantage of the natural tendencies of the block copolymers to form ordered linear arrays, with the posts serving to guide the arrays during the assembly process. A future vision of lithography, where engineering and chemistry work together to construct complex and useful nanometer-length-scale patterns is e
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MAR
11
Tuesday
Nuclear Physics Seminar
"ePHENIX: An Electron Ion Collider Detector Built Around the BaBar Magnet"
Presented by Alexander Bazilevsky, BNL
11 am, Small Seminar Room, Bldg. 510
Tuesday, March 11, 2014, 11:00 am
Hosted by: Oleg Eyser
As a particular realization of an electron ion collider (EIC), the eRHIC project envisions the addition of a high intensity polarized electron beam to the existing RHIC facility, providing e+p and e+A collisions and enabling precision studies of the partonic structure of hadronic matter. To fully exploit the physics potential of eRHIC, the PHENIX Collaboration is proposing a detector built upon sPHENIX, a planned upgrade of the current PHENIX experiment. This new detector, ePHENIX, uses the sPHENIX superconducting solenoid and barrel calorimetry and adds to this foundation precision tracking, particle-identification and calorimetry in the barrel, electron-going and hadron-going directions, opening a broad range of exciting EIC physics measurements (see http://arxiv.org/abs/1402.1209). We give an overview of ePHENIX detector design and discuss its broad capabilities for both nucleon structure imaging and high density nuclear matter studies.
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MAR
11
Tuesday
Weight Watchers
"Weight Watchers"
12:15 pm, Conference Room A/B, Bldg. 490
Tuesday, March 11, 2014, 12:15 pm
Hosted by: Michael Thorn
On Site Weight Watchers Meetings!! Getting started with Weight Watchers is now Simpler then ever with Simple Start. Come on in and learn about our straight forward do-able 2 week started plan with delicious meal ideas and a great new app to get you started losing weight and on the path to long term success. Weight Watchers today at 12:15 in the Conference Room #490. If you are not already a member check out a meeting for free and hear all about Simple Start! Take advantage of the convenience of On-Site weekly meetings every Tuesday. Time for a new beginning.
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MAR
11
Tuesday
Physics Colloquium
"The evolution of the LHC experiments toward the High Luminosity LHC"
Presented by Francesco Lanni, BNL
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, March 11, 2014, 3:30 pm
Hosted by: William Morse
In light of the successful two year long first run and the discovery of the Higgs Boson, the LHC experiments are defining plans for the High Luminosity upgrades of the LHC complex. Physics motivations, strategies and technologies of the experiments, in particular of the ATLAS and CMS detectors, are reviewed.
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MAR
11
Tuesday
PubSci
"Big Bang Physics and the Building Blocks of Matter"
Presented by Berndt Mueller, Paul Sorensen, Agnes Mocsy, Brookhaven National Laboratory and Pratt Institute
7 pm, Hoptron Brewtique, 22 West Main St., Patchogue, NY
Tuesday, March 11, 2014, 7:00 pm
PubSci, a new science cafe series, provides a lively setting for the science-interested public to engage in discussions with scientists from Brookhaven National Laboratory in an informal and casual way. For our first event, we'll be joined by physicists who work at Brookhaven's particle collider to talk about how we explore what happened at the dawn of time from a Lab on Long Island. How did the Universe take shape? What binds matter together? How do we answer those questions? You don't need a degree to join the conversation. But you do need to be over 21. (The venue's rules, not ours.) Admission is free. Let us know you're coming - RSVP at the PubSci website.
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MAR
12
Wednesday
BSA Noon Recital
"'Dynamic' Duo Canellakis-Brown to Perform at Brookhaven Lab"
12 pm, Berkner Hall Auditorium
Wednesday, March 12, 2014, 12:00 pm
Hosted by: BSA
Hailed as "a pair of adventurous young talents," cellist Nicholas Canellakis and pianist/composer Michael Brown captivate audiences with thrilling performances
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MAR
13
Thursday
Particle Physics Seminar
"Initial performance of the CUORE-0 experiment"
Presented by Kyungeun Lim, Yale University
2 pm, Physics, Building 510, Room 2-95
Thursday, March 13, 2014, 2:00 pm
Hosted by: Elizabeth Worcester
CUORE-0 is a cryogenic detector at Laboratori Nazionali del Gran Sasso in Italy that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay of 130Te. I will present the first analysis of data collected since March 2013 and will report on the performance, energy resolution, and backgrounds of the experiment. Based on the measurements in the region of interest, the CUORE-0 half-life sensitivity is expected to surpass the observed lower bound of Cuoricino, a predecessor experiment, with one year of live time. CUORE-0 also serves as a technical prototype of CUORE, which will consist of 19 towers identical to the single CUORE-0 tower. The successful commissioning of CUORE-0 represents a major milestone towards CUORE, which is currently under construction and scheduled to begin data taking in 2015.
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MAR
13
Thursday
Instrumentation Division Seminar
"Non Evaporable Getter (NEG) Technologies in UHV-XHV vacuum systems: sorption mechanisms, experimental data and examples"
Presented by Enrico Maccallini, SAES Getters S.p.A., Italy
2:30 pm, Large Conference Room, Bldg. 535
Thursday, March 13, 2014, 2:30 pm
Since 70's, Non Evaporable Getter (NEG) pumps have been adopted by R&D labs, research centres, the industry and in large physics projects (i.e., accelerators, synchrotrons, fusion reactors...). NEG pumps are very compact, light and vibration-free. They require minimal power and present reduced magnetic interference. Their large pumping speed for hydrogen, the main residual gas in UHV-XHV systems, and also all active gases, makes NEG pumps the ideal choice to get and maintain low pressure conditions in a variety of applications. The basic chemical and physical principle of operation of getter pumps, as well as their main practical features, will be presented with a special focus on their typical applications in accelerators, portable systems, surface science and other laboratory equipment.
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MAR
17
Monday
Biosciences Department Seminar
"Omic-Methods to Divine Gene Function"
Presented by Ian Blaby, Department of Chemistry and Biochemistry, University of California, Los Angeles
11 am, John Dunn Seminar Room, Bldg. 463
Monday, March 17, 2014, 11:00 am
Hosted by: David Schlyer
Determination of gene function remains the primary biological goal in the post-genomic era. Chlamydomonas reinhardtii, a JGI flagship organism, is a premier reference for studies in fundamental processes, such as photosynthesis, cilia biogenesis, micronutrient homeostasis and value-added commodities. Yet only ~10% of predicted genes are associated with an experimentally validated functional annotation. Fortunately, significant advances in the depth, throughput and reduced cost of sequencing technologies are opening new avenues for probing gene function and assigning annotations. Recently, we have employed timecourse RNA-Seq approaches to investigate the molecular basis enabling a nitrogen-deprived starch-null mutant to accumulate more triacylglycerol (TAG) than starch-plus strains. Our transcriptomes were supported with selected in vitro biochemical assays, targeted metabolite studies and whole genome sequencing, and have provided novel insights to TAG production. More recent investigations have included: i) employment of gene co-expression analyses to predict protein localizations in a day/night cycling culture analyzed by high temporal-resolution transcriptomes, and ii) development of systems required for high-throughput, automated, phenotyping in conjunction with genome sequencing in a genome wide mutant collection we have constructed.
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MAR
18
Tuesday
Weight Watchers
"Weight Watchers"
10:30 am, Conference Room A/B, Bldg. 490
Tuesday, March 18, 2014, 10:30 am
Hosted by: michael Thorn
On Site Weight Watchers Meetings!! Getting started with Weight Watchers is now Simpler then ever with Simple Start. Come on in and learn about our straight forward do-able 2 week started plan with delicious meal ideas and a great new app to get you started losing weight and on the path to long term success. Weight Watchers today at 12:15 in the Conference Room #490. If you are not already a member check out a meeting for free and hear all about Simple Start! Take advantage of the convenience of On-Site weekly meetings every Tuesday. Time for a new beginning.
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MAR
18
Tuesday
Biosciences Department Seminar
"Metallomics: A Whole-Genome Approach to the Study of Intracellular Metal Trafficking"
Presented by Crysten Blaby-Haas, Department of Chemistry and Biochemistry, University of California, Los Angeles
11 am, John Dunn Seminar Room, Bldg. 463
Tuesday, March 18, 2014, 11:00 am
Hosted by: David Schlyer
All organisms are dependent upon the availability of transition metals, which either participate directly in catalysis or serve structural roles in proteins. Because of the nutrient-toxin dichotomy, the cell tightly regulates uptake, distribution and storage of these trace elements. Numerous pathways have evolved to ensure that the right metal, at the correct concentration, makes its way to a specific protein. When faced with a suboptimal trace element concentration, metallo-enzyme activity is negatively impacted by lack of cofactor, which is exacerbated by potential binding of the wrong cofactor. Using transcriptome sequencing of a unicellular green alga under various metal-deficiency situations, we are revealing strategies that widen the window of metal concentrations in which a plant can survive. These strategies include sparing and salvaging of the limiting nutrient, sequestration of non-limiting metals, and cross-talk between metal-responsive transcription factors.
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MAR
18
Tuesday
Getting Fiscally Fit
"Presented by The Foundation for Personal Financial Education"
Craig J. Ferrantino, Chapter Director FPFE
12 pm, Berkner Hall, Room B
Tuesday, March 18, 2014, 12:00 pm
Are You Fiscally Fit? Build a solid financial future through the process of proper financial planning! Join us for this first workshop in the "Fiscally Fit" seminar series and learn how to: • Overcome the roadblocks to financial success • Create and maintain a financial blueprint • Cultivate daily habits to positively influence your financial fitness • Develop your own action steps to financial freedom • Identify cash flow traps • Put dollars back into your monthly cash flow through proper tax-planning
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MAR
18
Tuesday
Physics Colloquium
""Topological Materials at the Nanoscale""
Presented by Jennifer Hoffman, Harvard University
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, March 18, 2014, 3:30 pm
Hosted by: John Tranquada
Once or twice per decade, the discovery of a new class of electronic materials takes the world by storm, generating thousands of scientific publications per year, and broad hopes for practical applications. In this category are the so-called "topological materials" â€" typically bulk insulators hosting topologically protected metallic surface states whose strongly coupled spin and momentum degrees of freedom have prompted numerous proposals for nanoscale devices. After an introduction to topological materials, I will describe efforts in my laboratory to measure their properties via low temperature scanning tunneling microscopy. In the topological semimetal antimony (Sb), we study the effects of single-atom defects, we quantify parameters relevant to spintronics applications, and we establish new techniques for nanoscale band structure measurements. We further apply these techniques to SmB6, whose anomalous electronic properties have remained mysterious for almost 50 years, but may finally be explained as arising from a topological Kondo insulator phase.
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MAR
20
Thursday
BWIS Career Day
"BWIS High School Career Day 2014"
8:30 am, Brookhaven Center
Thursday, March 20, 2014, 8:30 am
Hosted by: Kahille Dorsinvil
This annual event starts with various groups within the lab speaking informally with participants from local area high schools. Two speakers briefly outline their career path - why they chose science and how they got to where they are today. After lunch, a researcher shares the details about their current research project, and the day finishes with a short visit to the Science Learning Center for hand-on science fun.
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MAR
20
Thursday
Particle Physics Seminar
"Precision measures of the primordial deuterium abundance"
Presented by Ryan Cooke, UC Santa Cruz
3 pm, Small Seminar Room, Bldg. 510
Thursday, March 20, 2014, 3:00 pm
Hosted by: Anze Slosar
We are currently in an exciting era of precision cosmology. With the release of the cosmic microwave background data recorded by the Planck satellite, we are now in a position to accurately test the standard model of cosmology and particle physics. In this talk, I will present two new, precise measures of the primordial abundance of deuterium - the most accurate measurements to date - derived from redshift ~3 metal-poor damped Lyman-alpha systems. In light of these new measurements, we have performed a careful reanalysis of the best literature systems where the primordial deuterium abundance can be estimated. These precise measures, when analyzed in conjunction with the Planck data, now place strong limits on the effective number of neutrino species in the early Universe, and offers new insight into physics beyond the standard model. I will also discuss our ongoing survey to obtain new precision measures of the primordial deuterium abundance.
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MAR
27
Thursday
NSLS-II Seminar
"A metallic glass that grows from the melt like a crystal"
Presented by Gabrielle Long, ANL, United States Minor Outlying Islands
2 pm, Bldg. 743 Rm 177
Thursday, March 27, 2014, 2:00 pm
Hosted by: Wah-Keat Lee
Canceled Seminar scheduled for 2/13/14 due to snow and will be rescheduled. Exact date is unknown but selected 3/27/14 as an estimated dated (posted by em 2/12/14). When a molten material is cooled, it typically grows into orderly crystals. But if the cooling rate is too fast for the entire melt to crystallize, the remaining material ends up in a non-crystalline state known as a glass. This talk is about the discovery and characterization of a unique metallic glass that, during rapid cooling, forms a solid by means of nucleation followed by growth normal to a moving interface between the solid and melt, with partitioning of the chemical elements. We were able to show experimentally that this is not a polycrystalline composite with nanometer-sized grains, and conclude that this may be a new kind of structure: an atomically ordered, isotropic, non-crystalline solid, possessing no long-range translational symmetry. This novel structureâ€"isotropic with infinite rotational symmetry and no translational symmetryâ€"had been considered theoretically possible, but has never before been observed.
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APR
1
Tuesday
Nuclear Physics Seminar
"Extracting Rigorous Conclusions from Model-Data Comparisons"
Presented by Scott Pratt, Michigan State University
11 am, Small Seminar Room, Bldg. 510
Tuesday, April 1, 2014, 11:00 am
Hosted by: Hui Wang
RHIC science has entered an era where the goal is to make quantitative statements about the evolution and properties of the super-hadronic matter created in high-energy heavy-ion collisions. Given the heterogenous nature of the RHIC and LHC heavy-ion data sets, the significant uncertainties to the theoretical models, and the complex intertwined dependencies between model parameters and observables, stating conclusions with meaningful uncertainties represents a major challenge. I will present results from the MADAI collaboration, where we have constructed a statistical infrastructure for addressing exactly such problems and applied it to a subset of soft observables from 100A GeV + 100A GeV Au + Au collisions. The results from this pilot project are promising and the techniques should be extendable to larger data sets and to more flexible models with greater numbers of parameters.
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APR
15
Tuesday
Physics Colloquium
"The proton-neutron interaction and the emergence of collectivity in the structure of atomic nuclei"
Presented by Richard F. Casten, Yale University
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, April 15, 2014, 3:30 pm
Hosted by: Peter Petreczky
Despite the complexities of the nucleonic interactions in atomic nuclei, nuclei display remarkably simple patterns, and regularities as a function of neutron and proton number. Many of these patterns are associated with the emergence of collective behavior. Such behavior is largely the result of a competition between pairing interactions between like nucleons and proton-neutron (p-n) interactions. The Colloquium will survey the empirical behavior of nuclei and present ways to experimentally extract the strength of p-n interactions. The pivotal role of the latter in determining the former will then be discussed in terms of the correlations of p-n interaction strengths with the onset of collectivity and a newly recognized parallelism in the filling of proton and neutron orbits.
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APR
22
Tuesday
Physics Colloquium
"Prospects for the physics of cold, sparse hadrons"
Presented by Craig Roberts, ANL
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, April 22, 2014, 3:30 pm
Hosted by: Peter Petreczky
Hadron physics is unique at the forefront of science in tackling a problem whose fundamental degrees of freedom have never been directly observed. This presentation will describe some of the opportunities and challenges presented by the next decade — with an upgrade at Jefferson Lab, fixed target experiments at FermiLab and worldwide discussions about an electron ion collider.
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APR
29
Tuesday
Physics Colloquium
"Redrawing the boundary between classical and quantum mechanics"
Presented by Mishkatul Bhattacharya, Rochester Institute of Technology
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, April 29, 2014, 3:30 pm
Hosted by: Rob Pisarski
Advances at the intersection of quantum optics, nanoscience, gravitational wave interferometry and microwave technology are currently allowing experimentalists to extend the reach of quantum mechanics to large mechanical objects. As an emerging frontier in physics, macroscopic quantum mechanics is expected to yield fundamental insights as well as novel technologies. This talk will be centered around experiments on cryogenic electromechanical systems, optical resonator-cooled mechanics and levitated microparticles. Recent theoretical work on optomechanics in our group at RIT will also be discussed.
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MAY
6
Tuesday
Physics Colloquium
"How Do Massive Stars Supernova?"
Presented by Adam Burrows, Princeton University
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, May 6, 2014, 3:30 pm
Hosted by: Peter Petreczky
"Core-collapse supernovae have challenged theorists and computational science for half a century. Such explosions are the source of many of the heavy elements in the Universe and the birthplace of neutron stars and stellar-mass black holes. However, determining the mechanism of explosion remains the key goal of theory. Though the synergistic operation of turbulence and neutrino heating seems implicated, and multi-dimensional simulations with some physical fidelity that have provided insight, we have yet to reproduce the phenomenon theoretically. In this talk, I will review the goals of supernova theory, the state of the field, and the contending explosion models. In the process, I will highlight the computational astrophysics that has been applied to date, and that may be necessary in the future to credibly unravel this mystery."
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MAY
13
Tuesday
Physics Colloquium
"Materials in 2-dimension and beyond"
Presented by Philip Kim, Columbia University
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, May 13, 2014, 3:30 pm
Hosted by: John Tranquada
The recent advent of atomically thin 2-dimensional materials such as graphene, hexa boronitride, layered transition metal chalcogenide and many strongly correlated materials, where weak van der Waals (vdW) force holds the layers together, has provide a new opportunity of studying novel quantum phenomena in low dimensional systems. The vdW layered materials consist of covalently bonded atomic layers entities that weakly interact with other constituents. With a strong built-in anisotropy in their components, vdW materials often show a quasi-low dimensionality leading to strongly correlated electron behaviors. These materials in 2-d limits also allow us to apply new experimental techniques such as electrolyte gating, scanning potentiometry, and electromechanical magnetometry. Moreover, combination of different layered constituents may produce heterogeneous and functional materials. In this talk, we will discuss to develop the method of transferring two-dimensional atomic layers of van der Waals solids to build functional heterostacks. Novel electron transport and optoelectronic phenomena can occur across these hetero-interfaces of atomicallycontrolled quantum heterostructures.
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JUN
10
Tuesday
Particle Physics Seminar
"The JUNO Reactor Neutrino Experiment"
Presented by Zeyuan Yu, Institute of High Energy Physics, Beijing, China, China
11 am, Small Seminar Room, Bldg. 510
Tuesday, June 10, 2014, 11:00 am
Hosted by: Elizabeth Worcester
Jiangmen Underground Neutrino Observatory (JUNO) is a medium baseline reactor neutrino experiment, to determine the neutrino mass hierarchy better than 3 sigma with 20kt liquid scintillator and six year data taking. The seminar will focus on the measurement of neutrino mass hierarchy with a short discussion on other possible physics topics, such as solar neutrino, supernova neutrino, etc. The progress of JUNO will also be reported, including project status, detector conceptual design, civil construction, electronics and offline software progress.
