Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M46: Topological Superconductivity: Theory
11:30 AM–2:18 PM,
Wednesday, March 17, 2021
Sponsoring
Unit:
DCMP
Chair: Yi-Ting Hsu
Abstract: M46.00006 : Multi-orbital superconductivity in 4Hb-TaS2 in the dirty limit: Part I*
12:30 PM–12:42 PM
Live
Presenter:
Ezra Day-Roberts
(University of Minnesota)
Authors:
Ezra Day-Roberts
(University of Minnesota)
David Dentelski
(Bar Ilan University)
Turan Birol
(University of Minnesota)
Jonathan Ruhman
(Bar Ilan University)
Rafael Fernandes
(University of Minnesota)
Thus, elucidating the interplay between these different electronic orders in stoichiometric 4Hb-TaS2, and its relationship to the alleged chiral superconducting phase, remain open questions. In part I of this talk, we present an effective tight binding model based on maximally localized Wannier functions for 4Hb-TaS2. We find a pronounced effect of the second-interlayer hopping, which makes the Fermi surfaces acquire mixed layer character. Moreover, the nonsymmorphic symmetry associated with a screw axis along the stacking direction and across the Ta atoms promotes fourfold degenerate bands at kz=pi/2.
*Work at University of Minnesota was supported primarily by the National Science Foundation through the University of Minnesota MRSEC under Award Number DMR-2011401.
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