Conductance matrix symmetries of multiterminal semiconductor-superconductor devices
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Nonlocal tunneling spectroscopy of multiterminal semiconductor-superconductor hybrid devices is a powerful tool to investigate the Andreev bound states below the parent superconducting gap. We examine how to exploit both microscopic and geometrical symmetries of the system to extract information on the normal and Andreev transmission probabilities from the multiterminal electric or thermoelectric differential conductance matrix under the assumption of an electrostatic potential landscape independent of the bias voltages, as well as the absence of leakage currents. These assumptions lead to several symmetry relations on the conductance matrix. Next, by considering a numerical model of a proximitized semiconductor wire with spin-orbit coupling and two normal contacts at its ends, we show how such symmetries can be used to identify the direction and relative strength of Rashba versus Dresselhaus spin-orbit coupling. Finally, we study how a voltage-bias-dependent electrostatic potential as well as quasiparticle leakage breaks the derived symmetry relations and investigate characteristic signatures of these two effects.
Originalsprog | Engelsk |
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Artikelnummer | 104516 |
Tidsskrift | Physical Review B |
Vol/bind | 106 |
Udgave nummer | 10 |
Antal sider | 16 |
ISSN | 2469-9950 |
DOI | |
Status | Udgivet - 2022 |
Bibliografisk note
Funding Information:
The authors want to thank A. Danilenko, A. Pöschl, and C. Marcus for useful discussions. This work was supported by the Danish National Research Foundation, the Danish Council for Independent Research | Natural Sciences. The authors acknowledge Microsoft research for support and computational resources.
Publisher Copyright:
© 2022 American Physical Society.
Links
- https://arxiv.org/pdf/2205.11193.pdf
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