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Scientists in Brookhaven's Condensed Matter Physics & Materials Science Department study basic, theoretical and applied aspects of materials, their utilization, and their electronic, physical, mechanical, and chemical properties in relation to their structure. 

The field of Condensed Matter Physics and Materials Science integrates the knowledge and tools of chemistry and physics with the principles of engineering to understand and optimize the behavior of materials, as well as to create new and improved materials to help fulfill the missions of the Department of Energy.

  1. NOV



    Condensed-Matter Physics & Materials Science Seminar

    "Spin Orbital Dimer Singlets and Vibronic Fluctuations in a Cluster Mott Insulator"

    Presented by Kemp Plumb, Brown University

    11 am, Virtual Seminar

    Thursday, November 5, 2020, 11:00 am

    Hosted by: Mark Dean

    The spatially anisotropic character of d-orbitals in transition metal compounds can lead to many and diverse 'quantum' phases of matter when spin orbit coupling is on equal footing with with electronic correlations. These phases include multi-polar orders, spin liquids, and/or spin orbitals liquids. The most celebrated example is the Kitaev model for j=1/2 Kramers doublets on the honeycomb lattice. When orbital degeneracy is introduced, the resulting orbital fluctuations open up many unexplored possibilities. In this seminar, I will introduce the cluster Mott insulating lacunar spinels as class of model materials where correlations, spin orbit coupling, and orbital degeneracy act in concert to produce several interesting magnetic phases. Following this, I will present a set of neutron scattering results on one member of this family: GaTa4Se8, a material that realizes j=3/2 model on the FCC lattice. We observe that the ground state of GaTa4Se8 is a spin-orbital dimer singlet phase and capture the collective magnetic excitations from that state. Intriguingly, the dimerization transition is preceded by a regime of dynamic vibronic fluctuations extending to temperatures four times higher than the global symmetry breaking transition. I will discuss these results in relation to the quadrupolar ordering transition recently proposed for the sister compound GaNb4Se8. Zoom Meeting

Condensed Matter Theory

Conducts basic research over a wide swath of theoretical physics, ranging from strongly correlated electrons to first principle electronic structure theory.  

Neutron Scattering

Studies the role of antiferromagnetism in high-temperature superconductors.  The interaction of charge carriers with magnetic moments is of critical importance but remains a challenge to understand. .

X-Ray Scattering

Carries out basic studies of the structural, electronic and magnetic properties of condensed matter systems using synchrotron-based x-ray scattering techniques. .

comscope logo

The Center for Computational Material Spectroscopy and Design develops, advances, and shares a powerful and user-friendly software suite called Comsuite to accelerate the discovery, analysis, and design of functional strongly correlated materials—the basis for next generation technologies.

Electron Microscopy and Nanostructure

Utilizes advanced electron microscopy techniques to study nanoscale structure and defects that determine the utility of functional materials, such as superconductors, multiferroics, and other energy related systems including thermoelectrics, photovoltaics, and batteries.

Oxide Molecular Beam Epitaxy

Addresses key open questions in HTS physics such as the dimensionality of the HTS phenomenon, the spin and charge of free carriers, the nature of the superconducting transition, the role of charge stripes (if any) in the HTS state, the nature of the overdoped metallic state, and more.

Spectroscopic Imaging

Span a wide range of quantum matter systems, including superconductors, superfluids, supersolids, electronic liquid crystals, topological insulators superconductors & superfluids, heavy fermions, and spin liquids. Throughout, the focus is on development of innovative techniques and approaches to each problem.

Advanced Energy Materials

Studies both the microscopic and macroscopic properties of complex and nano-structured materials with a view to understanding and developing their application in different energy related technologies

Electron Spectroscopy

Explores the electronic structure and electrodynamics of topological insulators and strongly correlated electron systems, with particular attention to emergent phenomena, such as superconductivity and magnetism, using angle-resolved photoemission (ARPES) and optical spectroscopy.

The Condensed Matter Physics and Materials Science Department is part of Brookhaven National Laboratory's Energy Sciences Directorate.