Abstract
We performed microwave spectroscopy of an InAs nanowire between superconducting contacts implementing a finite-length, multichannel Josephson weak link. Certain features in the spectra, such as the splitting by spin-orbit interactions of the transition lines among Andreev states, have been already understood in terms of noninteracting models. However, we identify here additional transitions, which evidence the presence of Coulomb interactions. By combining experimental measurements and model calculations, we reach a qualitative understanding of these very rich Andreev spectra.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 197702 |
| Tidsskrift | Physical Review Letters |
| Vol/bind | 128 |
| Udgave nummer | 19 |
| Antal sider | 6 |
| ISSN | 0031-9007 |
| DOI | |
| Status | Udgivet - 12 maj 2022 |
Finansiering
Technical support from P. S ' enat is gratefully acknowledged. We thank P. Orfila and S. Delprat for nanofabrication support, and our colleagues from the Quantronics group and C. Strunk for useful discussions. We thank Will Oliver and Lincoln Laboratories for providing us with the TWPA used in the experiment, and E. Flurin for suggesting the bridge sample geometry. We thank V. Fatemi, M. H. Devoret, P. D. Kurilovitch, and L. I. Glazman for sharing with us their preprint [36], for useful comments on ours, and for fruitful discussions. We also thank M. Houzet and J. Paaske for their comments. This work has been supported by ANR contract JETS, by FET-Open contract AndQC, the Danish National Research Foundation, by the Renatech network, by the Spanish AEI through Grant No. PID2020117671 GB-I00 and through the "Maria de Maeztu" Programme for Units of Excellence in R&D (CEX2018000805-M). C. Metzger was supported by Region Ile-deFrance in the framework of DIM SIRTEQ. F. J. M.-C. acknowledges support from the Spanish Ministry of Universities (FPU20/01871).
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