General Information

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August 2014
Sunday Monday Tuesday Wednesday Thursday Friday Saturday

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  1. Summer Sundays

    10 am, Berkner Hall Auditorium

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11

  1. Photon Sciences Directorate Seminar

    1 pm, Bldg. 745, Room 156

    Hosted by: Dr. Qun Shen

    The Brazilian Synchrotron Light Laboratory has started the construction of Sirius, a 3 GeV and 0.28 nm rad emittance storage ring. In this talk, Dr. Westfahl will present some of the main aspects of this new storage ring and its first and second phase beamlines, as well as the current status of the project.

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  1. Condensed-Matter Physics & Materials Science Seminar

    10:30 am, Bldg. 480 Conference Room

    Hosted by: Qiang Li

    Composition tuning in compound semiconductors allows for band structure engineering, which opens many avenues in fundamental and applied research. Here, I will show the application of band structure engineering in optimizing the electronic properties of bulk thermoelectric materials as well as probing the surface transport of topological insulator thin films. The main motivation of current thermoelectric research is to optimize the figure of merit ZT, so that the efficiency can be improved in (i) recovering waste industrial heat as well as (ii) providing local cooling of electronic devices. However, it is a challenge to independently tune the thermoelectric parameters that lead to high ZTs. We have found that Mg2Si1-xSnx thermoelectric material not only shows excellent thermoelectric performance but also exhibits decoupled Seebeck coefficient (α) and electrical conductivity (σ). We discover the convergence of two conduction bands in this material, which enhances the density-of-states effective mass and α in a large temperature range, without any detrimental effect on σ. Thus, a significantly improved power factor (PF = α2σ) is achieved, which results in a record high ZT in this material. Another material example with interesting consequences of band structure engineering is (Bi1-xSbx)2Te3. This material has become a mainstream material in the research of 3D topological insulators due to their potential to obtain surface transport protected by time-reversal-symmetry. I will show that using molecular beam epitaxy technique we can (i) tune the Bi/Sb ratio and (ii) control the thickness (as thin as several quintuple layers), which allow the observation of a dramatic distinction in electronic transport between high quality films and their bulk counterparts. An insulating-like regime has been obtained, which has enabled studies of magneto-resistance and thermoelectric properties associated with surface states.

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  1. SEP

    10

    Wednesday

    BSA Noon Recital

    "Dali Quartet to Perform at Brookhaven Lab"

    12 pm, Berkner Hall Auditorium

    Wednesday, September 10, 2014, 12:00 pm

    Hosted by: BSA

    The Dali Quartet will perform classical and Latin-American music at noon on September 10 in Brookhaven Lab's Berkner Hall.

  2. SEP

    11

    Thursday

    Community Advisory Council Meeting

    "Open to the Public"

    6:30 pm, Berkner Hall, Room B

    Thursday, September 11, 2014, 6:30 pm

  3. SEP

    17

    Wednesday

    PubSci

    "Illumination: Exposing the Secret Structures of the Atomic World"

    7 pm, Storyville American Table 43 Green Street Huntingt

    Wednesday, September 17, 2014, 7:00 pm

  4. OCT

    21

    Tuesday

    Suffolk County Planning Federation

    "Autumn Planning Conference - 2014"

    3:30 pm, Berkner Hall Auditorium

    Tuesday, October 21, 2014, 3:30 pm

  5. OCT

    22

    Wednesday

    BSA Noon Recital

    "Piano concert: Christina and Michelle Naughton"

    12 pm, Berkner Hall Auditorium

    Wednesday, October 22, 2014, 12:00 pm

    Hosted by: BSA

  6. NOV

    13

    Thursday

    Workshop

    "Short Course: Methods and Applications of X-Ray Absorption Fine Structure Spectroscopy"

    9 am, Berkner Hall, Room B

    Thursday, November 13, 2014, 9:00 am

  7. NOV

    14

    Friday

    Workshop

    "Short Course: Methods and Applications of X-Ray Absorption Fine Structure Spectroscopy"

    9 am, Berkner Hall, Room B

    Friday, November 14, 2014, 9:00 am

  8. NOV

    15

    Saturday

    Workshop

    "Short Course: Methods and Applications of X-Ray Absorption Fine Structure Spectroscopy"

    2:45 pm, Berkner Hall, Room B

    Saturday, November 15, 2014, 2:45 pm