Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F08: Interacting Topological Systems
8:00 AM–10:48 AM,
Tuesday, March 5, 2024
Room: L100I
Sponsoring
Unit:
DCMP
Chair: Xiao Li
Abstract: F08.00007 : Berry curvature and topological characterization for strongly correlated electron systems*
9:12 AM–9:24 AM
Presenter:
Chandan Setty
(Rice University)
Authors:
Chandan Setty
(Rice University)
Fang Xie
(Rice University)
Shouvik Sur
(Rice University)
Lei Chen
(Rice University)
Maia G Vergniory
(DIPC)
Silke Paschen
(T U Vienna)
Jennifer Cano
(Stony Brook University)
Qimiao Si
(Rice University)
especially in cases with nodal excitations, is a problem of extensive current interest [1,2]. In non-
interacting cases, Bloch functions specify the Berry curvature and quantized topological charge of
symmetry protected band crossings. However, in strongly correlated systems, in particular where the
quasiparticle picture fails, Bloch functions cannot be used and no suitable alternative approaches are
available. Here we fill this void by developing a Green’s function approach. We illustrate our
approach in the extreme correlation limit with nodal states. Our formalism offers a way to
systematically characterize electronic topology in strongly correlated settings [3].
[1] Hu, H., Chen, L., Setty, C. Garcia-Diez, M., Grefe, S.E., Prokofiev, A., Kirchner, S., Vergniory,
M.G., Paschen, S., Cano, J. and Si, Q., 2021. arXiv preprint arXiv:2110.06182.
[2] Setty, C., Sur, S., Chen, L., Xie, F., Hu, H., Paschen, S., Cano, J. and Si, Q., 2023. arXiv preprint
arXiv:2301.13870.
[3] Setty, C et al (in prep)
*Work at Rice supported by the DOE BES (DE-SC0018197) and AFOSR (FA9550-21-1-0356).
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