Flat Band Effects in Model Lattice Crystals
ORAL · Invited
Abstract
The notion of an electronic flat band refers to a collectively degenerate set of quantum mechanical eigenstates in periodic solids. The vanishing kinetic energy of flat bands relative to the electron-electron interaction is expected to result in a variety of many-body quantum phases of matter. Here we present recent developments in realizing flat bands in transition element-based crystalline materials. We will discuss recent experiments in which three dimensional flat bands are realized and connections to magnetism and other emergent states. We will also comment on the potential role of band topology and prospects for using similar lattice and orbital engineering to realize new correlated systems.
*This work was funded, in part, by the Gordon and Betty Moore Foundation EPiQS Initiative (grant no. GBMF9070 to J.G.C.) (instrumentation development, DFT calculations), the Air Force Office of Scientific Research (AFOSR) (award FA9550-22-1-0432) (material synthesis, ARPES), the NSF (DMR-2104964) (material analysis), and the Center for Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), through the Ames Laboratory (contract no. DE-AC02-07CH11358) (pulsed-field experiments).
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Presenters
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Joseph G Checkelsky
- Massachusetts Institute of Technology