Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G59: Correlated Topology II: Theoretical Progress
11:30 AM–2:30 PM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -DuSable AB
Sponsoring
Unit:
DCMP
Chair: Bitan Roy, Lehigh University
Abstract: G59.00006 : Multitude of Topological Phase Transitions in Bipartite Lattices with Interacting Electrons and Rashba Coupling
12:30 PM–12:42 PM
Presenter:
Rahul Soni
(University of Tennessee)
Authors:
Rahul Soni
(University of Tennessee)
Amit B Sanyal
(University of Tennessee-Knoxville)
Nitin Kaushal
(Oak Ridge National Lab)
Satoshi Okamoto
(Oak Ridge National Lab)
Adriana Moreo
(University of Tennessee)
Elbio R Dagotto
(University of Tennessee)
We performed a Hartree-Fock study on interacting electrons moving in two different bipartite lattices: the dice and the Lieb lattices, at half filling. The non-interacting part for both these lattices comprises of : a nearest-neighbour (NN) hopping term, a NN Rashba spin-orbit coupling term, and an onsite energy term. Both lattices develop ferrimagnetic order in the U-λ phase diagram, where U is the Hubbard onsite repulsion and λ the Rashba spin-orbit coupling strength. Along with this, we observed an unexpected multitude of topological phases for both these lattices. All these topological phases are ferrimagnetic, but they differ among themselves in their set of six Chern numbers. The Chern numbers |C| observed in our study ranges from 0 to 3, showing that large Chern numbers can be obtained by the effect of electronic correlations, adding to the recently discussed methodologies to increase |C| based on extending the hopping range in tight-binding models, using sudden quenches, or photonic crystals, all without including electronic interactions.
[1] R. Soni, N. Kaushal, S. Okamoto, and E. Dagotto, Phys. Rev. B 102, 045105 (2020).
[2] R. Soni, AB Sanyal, N. Kaushal, S. Okamoto, A. Moreo, E. Dagotto, arXiv.2110.03813 (2021)
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700