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 G65: Topological Qubits
11:30 AM–2:30 PM,
Tuesday, March 7, 2023
Room: Room 414
Sponsoring
Unit:
DQI
Chair: Alexandre Bourassa, University of Chicago
Abstract: G65.00009 : Superconducting quantum effects in Ge-Si core-shell nanowires*
1:30 PM–1:42 PM
Presenter:
Joost Ridderbos
(University of Twente)
Authors:
Joost Ridderbos
(University of Twente)
Zhen Wu
(University of Twente)
Ang Li
(Eindhoven University of Technology)
Erik P. A. M. Bakkers
(Eindhoven University of Technology)
Chuan Li
(University of Twente)
Alexander Brinkman
(University of Twente)
Floris Zwanenburg
(Univ of Twente)
With the latter in mind, we use superconducting Al leads on the Ge-Si nanowire to explore the interaction between the superconducting condensate and quantum states in the wire. We use two different types of devices: (i) gate-tunable nanowire Josephson junctions and (ii) tunnel spectroscopy devices which combine a superconducting contact with normal contacts and tunneling gates. A novel contacting recipe gives us control over the tunnel coupling between superconductor and semiconductor and therefore prevents renormalization of the SOI and g-factor towards the bulk Al value; an essential step towards realizing a topological phase transition. Furthermore, we explore a redistribution of Shapiro step patterns and an anomalous enhancement of the critical Josephson current, both as a function of magnetic field.
[1] PRB 90, 155437 (2014)
[2] PRB 90, 195421 (2014)
[3] PRB 97, 045415 (2018)
*The TOPSQUAD project has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement #862046
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