Non-Fermi Liquid Topological Semimetals
ORAL
Abstract
Whether and how correlated topological states without free-electron counterparts occur
in metallic systems is an open and pressing question. In heavy fermion systems, it has recently
become possible to utilize symmetry to design correlated topological semimetals [1]. In this
work, we introduce a general framework where lattice symmetries constrain single-particle
excitations even when the Fermi-liquid description breaks down, and substantiate it in a two-
channel periodic Anderson model [2]. We demonstrate that correlation-induced emergent
excitations are constrained by lattice symmetries to produce non-Fermi liquid topological
phases. The topological nature of these phases is characterized by surface states and valley
and spin Hall conductivities. We further identify candidate materials to realize the proposed
phases. Our work opens a door to a variety of non-Fermi liquid topological phases in a broad
range of strongly correlated materials.
Work at Rice was supported by the AFOSR Grant # FA9550-21-1-0356 and the NSF Grant #
DMR-2220603.
[1] L. Chen et al., Nat. Phys. (2022). https://doi.org/10.1038/s41567-022-01743-4
?[2] H. Hu, et al., arXiv:2110.06182
in metallic systems is an open and pressing question. In heavy fermion systems, it has recently
become possible to utilize symmetry to design correlated topological semimetals [1]. In this
work, we introduce a general framework where lattice symmetries constrain single-particle
excitations even when the Fermi-liquid description breaks down, and substantiate it in a two-
channel periodic Anderson model [2]. We demonstrate that correlation-induced emergent
excitations are constrained by lattice symmetries to produce non-Fermi liquid topological
phases. The topological nature of these phases is characterized by surface states and valley
and spin Hall conductivities. We further identify candidate materials to realize the proposed
phases. Our work opens a door to a variety of non-Fermi liquid topological phases in a broad
range of strongly correlated materials.
Work at Rice was supported by the AFOSR Grant # FA9550-21-1-0356 and the NSF Grant #
DMR-2220603.
[1] L. Chen et al., Nat. Phys. (2022). https://doi.org/10.1038/s41567-022-01743-4
?[2] H. Hu, et al., arXiv:2110.06182
*Work at Rice was supported by the AFOSR Grant # FA9550-21-1-0356 and the NSF Grant #DMR-2220603.
–
Publication: [1] L. Chen et al., Nat. Phys. (2022). https://doi.org/10.1038/s41567-022-01743-4
?[2] H. Hu, et al., arXiv:2110.06182
Presenters
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Silke Buehler-Paschen
- Institute of Solid State Physics, Vienna University of Technology, Vienna, Austria
- TU Vienna
- Vienna Univ of Technology
- Institute of Solid State Physics, TU Wien
- Vienna University of Technology
- Institute of Solid State Physics, Technischen Universita¨t (TU) Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.