Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session A14: Topological Superconductors and Superfluids: Theory
8:00 AM–10:48 AM,
Monday, March 4, 2024
Room: M100E
Sponsoring
Unit:
DCMP
Chair: Bitan Roy, Lehigh University
Abstract: A14.00001 : Crystal symmetry protected gapless vortex line phases in superconducting Dirac semimetals*
8:00 AM–8:12 AM
Presenter:
Shingo Kobayashi
(RIKEN)
Authors:
Shingo Kobayashi
(RIKEN)
Shuntaro Sumita
(The University of Tokyo)
Motoaki Hirayama
(The University of Tokyo)
Akira Furusaki
(RIKEN)
(screw) eigenvalues. The underlying mechanism for the formation of gapless vortex bound states depends on irreducible representations of rotation (screw) symmetry subject to a vortex field and is classified into three types: (i) accidental band crossing of two vortex bound-state modes under rotation symmetry; (ii) accidental and
(iii) enforced band crossing of four vortex bound-state modes under screw symmetry. Using a tight-binding model of screw symmetry protected Dirac semimetal with an s-wave pair potential, we demonstrate a gapless vortex line phase of type (ii).
*This work was supported by JSPS KAKENHI (Grants No. JP19K03680, No. JP19K14612, No. JP19H01824, and No. JP22K03478) and JST CREST (Grant No. JPMJCR19T2).
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