Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Z42: Topological Semimetals
11:30 AM–2:30 PM,
Friday, March 10, 2023
Room: Room 318
Sponsoring
Unit:
DMP
Chair: Saurav Islam, Pennsylvania State University
Abstract: Z42.00001 : Topological semimetals, topological phase transitions, and candidate materials*
11:30 AM–12:06 PM
Presenter:
Shuichi Murakami
(Tokyo Institute of Technology, Tokyo)
Author:
Shuichi Murakami
(Tokyo Institute of Technology, Tokyo)
Furthermore, among various properties of topological semimetals, we are recently focusing on an interplay between various topological degeneracies, such as Weyl points and nodal lines [5,6]. In particular, we introduce our work on the multi-helicoid surface states associated with Dirac points. Here we find that the Z2 topological invariant for the Dirac point in the previous work should be redefined and that it is eventually equal to the Z2 topological invariant for the glide-symmetric TCI. With this redefined Z2 topological invariant, we show the bulk-edge correspondence for the double/quad-helicoid surface states. Candidate materials for the multi-helicoid surface states are also discussed [5].
If time allows, we also briefly discuss our recent works on the fractional corner charges of three-dimensional obstructed atomic insulators with crystal shapes being vertex-transitive polyhedra [7,8], and on anomalous crystal shapes in topological insulators [9].
*This work was supported by JSPS KAKENHI Grant Numbers JP22H00108, 21K13865, and 22K18687, and by MEXT Initiative to Establish Next-generation Novel Integrated Circuits Centers (X-NICS).
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. |
© 2025 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