Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session A15: Superconductivity: Proximity Effects I
8:00 AM–10:36 AM,
Monday, March 4, 2024
Room: M100F
Sponsoring
Unit:
DCMP
Chair: Paula Fekete, US Military Academy West Point
Abstract: A15.00013 : Topological Andreev bands in three-terminal graphene Josephson junctions
10:24 AM–10:36 AM
Presenter:
Woochan Jung
(Pohang Univ of Sci & Tech)
Authors:
Woochan Jung
(Pohang Univ of Sci & Tech)
Seyoung Jin
(POSTECH)
Sein Park
(Postech)
Takashi Taniguchi
(Kyoto Univ)
Kenji Watanabe
(National Institute for Materials Science)
Gil Young Cho
(Pohang Univ of Sci & Tech)
Gil-Ho Lee
(Pohang Univ of Sci & Tech)
In this work, we investigate the artificial topological band structure of three-terminal graphene Josephson junctions by using tunneling spectroscopy. Differential tunnelling conductance shows the characteristic features of Andreev bound states (ABS) formed in the graphene. We independently controlled the superconducting phase configurations of the three superconducting leads connected to the junction by applying the flux gates and obtained the tomography of the ABS energy spectrum as a function of two independent phase differences. Such quasi-momentum v.s. energy map of ABS unveils the transition between gapped and gapless states, which corresponds to the topological band structure of nodal line semimetals. Our results show the potential of graphene based MTJJs for engineering band topology.
[1] J.E Avron Rev. Mod. Phys., 60, 873 (1988).
[2] Roman-Pascal Riwar, Manuel Houzet, Julia S.Meyer & Yuli V. Nazarov. Nature Comm. 7, 11167 (2016)
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