Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session K22: Superconductivity: Competing Phases-II
3:00 PM–5:36 PM,
Tuesday, March 7, 2023
Room: Room 214
Sponsoring
Unit:
DCMP
Chair: Kalyan Sasmal, Department of Physics, University of California, San Diego.
Abstract: K22.00002 : Theoretical analysis of anisotropic upper critical field in nodal-line semimetals
3:12 PM–3:24 PM
Presenter:
Junya Endo
(The University of Tokyo)
Authors:
Junya Endo
(The University of Tokyo)
Hiroyasu Matsuura
(Univ of Tokyo)
Masao Ogata
(Univ of Tokyo)
In this study, we apply the quasiclassical Green's function method to an effective three-dimensional model of nodal-line superconductors. We performed the calculations under two different limits: the clean limit with few impurities and the dirty limit with many impurities. As a result, we found three features: (1) the anisotropy in the direction, (2) linear behavior at low temperatures, and (3) convex downward behavior near the critical temperature. These behaviors are different from those in ordinary s-wave superconductors but are consistent with the experiments of nodal-line superconductors. This suggests that the model used in this study is useful for analyzing the superconductivity in nodal-line semimetals.
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