Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy

Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy

We perform microwave spectroscopy of Andreev states in superconducting weak links tailored in an InAs-Al (core-full shell) epitaxially grown nanowire. The spectra present distinctive features with bundles of four lines crossing when the superconducting phase difference across the weak link is 0 or π...

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Main Authors: L. Tosi, C. Metzger, M. F. Goffman, C. Urbina, H. Pothier, Sunghun Park, A. Levy Yeyati, J. Nygård, P. Krogstrup
Format: Article
Language:English
Published: American Physical Society 2019-01-01
Series:Physical Review X
Online Access:http://doi.org/10.1103/PhysRevX.9.011010
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spelling doaj-46d54f39692346b89f68d6e9062bc0772020-11-25T02:12:26ZengAmerican Physical SocietyPhysical Review X2160-33082019-01-019101101010.1103/PhysRevX.9.011010Spin-Orbit Splitting of Andreev States Revealed by Microwave SpectroscopyL. TosiC. MetzgerM. F. GoffmanC. UrbinaH. PothierSunghun ParkA. Levy YeyatiJ. NygårdP. KrogstrupWe perform microwave spectroscopy of Andreev states in superconducting weak links tailored in an InAs-Al (core-full shell) epitaxially grown nanowire. The spectra present distinctive features with bundles of four lines crossing when the superconducting phase difference across the weak link is 0 or π. We interpret these features as arising from zero-field spin-split Andreev states. A simple analytical model, which takes into account the Rashba spin-orbit interaction in a nanowire containing several transverse subbands, explains these features and their evolution with magnetic field. Our results show that the spin degree of freedom is addressable in Josephson junctions and constitute a first step towards its manipulation.http://doi.org/10.1103/PhysRevX.9.011010
collection DOAJ
language English
format Article
sources DOAJ
author L. Tosi
C. Metzger
M. F. Goffman
C. Urbina
H. Pothier
Sunghun Park
A. Levy Yeyati
J. Nygård
P. Krogstrup
spellingShingle L. Tosi
C. Metzger
M. F. Goffman
C. Urbina
H. Pothier
Sunghun Park
A. Levy Yeyati
J. Nygård
P. Krogstrup
Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
Physical Review X
author_facet L. Tosi
C. Metzger
M. F. Goffman
C. Urbina
H. Pothier
Sunghun Park
A. Levy Yeyati
J. Nygård
P. Krogstrup
author_sort L. Tosi
title Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
title_short Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
title_full Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
title_fullStr Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
title_full_unstemmed Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
title_sort spin-orbit splitting of andreev states revealed by microwave spectroscopy
publisher American Physical Society
series Physical Review X
issn 2160-3308
publishDate 2019-01-01
description We perform microwave spectroscopy of Andreev states in superconducting weak links tailored in an InAs-Al (core-full shell) epitaxially grown nanowire. The spectra present distinctive features with bundles of four lines crossing when the superconducting phase difference across the weak link is 0 or π. We interpret these features as arising from zero-field spin-split Andreev states. A simple analytical model, which takes into account the Rashba spin-orbit interaction in a nanowire containing several transverse subbands, explains these features and their evolution with magnetic field. Our results show that the spin degree of freedom is addressable in Josephson junctions and constitute a first step towards its manipulation.
url http://doi.org/10.1103/PhysRevX.9.011010
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