Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A10: Hybrid Superconducting Quantum Circuits
8:00 AM–11:00 AM,
Monday, March 15, 2021
Sponsoring
Unit:
DQI
Chair: Javad Shabani, New York Univ NYU
Abstract: A10.00001 : On-chip microwave spectroscopy of Andreev and Majorana bound states in semiconductor nanowires*
8:00 AM–8:36 AM
Live
Presenter:
Attila Geresdi
(Chalmers Univ of Tech)
Author:
Attila Geresdi
(Chalmers Univ of Tech)
In this talk, I will summarize our efforts to understand the Andreev level spectra in proximitized semiconductor nanowires by exploiting the AC Josephson effect and using on-chip microwave detection techniques based on superconducting tunnel junctions. With this technique, we investigate gate-tunable Andreev bound states in ballistic semiconductor nanowire channels [1] and the microwave spectrum of nanowire-based Cooper-pair transistors [2]. I will also showcase our measurements of the 4π-periodic Josephson effect above a threshold magnetic field [3], which is consistent with the topological phase transition and the emergence of Majorana bound states.
[1] D.J. van Woerkom et al, Nature Physics 13, 876 (2017)
[2] A. Proutski et al, Phys. Rev. B 99, 220504(R) (2019)
[3] D. Laroche et al, Nature Communications 10, 245 (2019)
*This work was supported by the European Union's Horizon 2020 research and innovation programme under grant numbers 804988 (ERC Stg SiMS) and 828948 (FET Open AndQC).
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