Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Y59: Dirac and Weyl Semimetals: Theory I
8:00 AM–10:48 AM,
Friday, March 18, 2022
Room: Hyatt Regency Hotel -DuSable AB
Sponsoring
Unit:
DCMP
Chair: Angkun Wu, Rutgers University
Abstract: Y59.00002 : When do Dirac points have higher order Fermi arcs?
8:12 AM–8:24 AM
Presenter:
Yuan Fang
(Stony Brook University (SUNY))
Authors:
Yuan Fang
(Stony Brook University (SUNY))
Jennifer Cano
(Stony Brook University; Flatiron Institute)
Recently, Dirac materials with four-fold rotation symmetry have been shown to exhibit a higher order bulk-hinge correspondence: they display "higher order Fermi arcs'', which are localized on hinges where two surfaces meet and connect the projections of the bulk Dirac points.
In this work, we classify higher order Fermi arcs for Dirac semimetals protected by a rotation symmetry and the product of time-reversal and inversion.
Such Dirac points can be either linear in all directions or linear along the rotation axis and quadratic in other directions.
By computing the filling anomaly for momentum-space planes on either side of the Dirac point, we find that all linear Dirac points exhibit higher order Fermi arcs terminating at the projection of the Dirac point, while the Dirac points that are quadratic in two directions lack such higher order Fermi arcs.
When higher order Fermi arcs do exist, they obey either a Z2 (four-fold rotation axis) or Z3 (three- or six-fold rotation axis) group structure.
Finally, we build two models with six-fold symmetry to illustrate the cases with and without higher order Fermi arcs. We predict higher order Fermi arcs in Na3Bi.
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