Large-bias spectroscopy of Yu-Shiba-Rusinov states in a double quantum dot
(2023) In Nanotechnology 34(13).- Abstract
We have performed tunnel transport spectroscopy on a quantum dot (QD) molecule proximitized by a superconducting contact. In such a system, the scattering between QD spins and Bogoliubov quasiparticles leads to the formation of Yu-Shiba-Rusinov (YSR) states within the superconducting gap. In this work, we investigate interactions appearing when one- and two-electron spin states in a double-QD energetically align with the superconducting gap edge. We find that the inter-dot spin-triplet state interacts considerably stronger with the superconductor than the corresponding singlet, pointing to stronger screening. By forming a ring molecule with a significant orbital contribution to the effective g-factor, we observe interactions of all four... (More)
We have performed tunnel transport spectroscopy on a quantum dot (QD) molecule proximitized by a superconducting contact. In such a system, the scattering between QD spins and Bogoliubov quasiparticles leads to the formation of Yu-Shiba-Rusinov (YSR) states within the superconducting gap. In this work, we investigate interactions appearing when one- and two-electron spin states in a double-QD energetically align with the superconducting gap edge. We find that the inter-dot spin-triplet state interacts considerably stronger with the superconductor than the corresponding singlet, pointing to stronger screening. By forming a ring molecule with a significant orbital contribution to the effective g-factor, we observe interactions of all four spin-orbital one-electron states with the superconductor under a weak magnetic field.
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- author
- Potts, Heidi LU ; Aspegren, Markus LU ; Debbarma, Rousan LU ; Lehmann, Sebastian LU and Thelander, Claes LU
- organization
- publishing date
- 2023-03
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- quantum dot, quantum ring, semiconductor, shiba states, superconductor
- in
- Nanotechnology
- volume
- 34
- issue
- 13
- article number
- 135002
- publisher
- IOP Publishing
- external identifiers
-
- pmid:36595334
- scopus:85146886586
- ISSN
- 0957-4484
- DOI
- 10.1088/1361-6528/aca90e
- language
- English
- LU publication?
- yes
- id
- 00c5e47f-1864-493d-b890-9c667bf20a06
- date added to LUP
- 2023-02-10 14:30:00
- date last changed
- 2024-09-19 13:52:08
@article{00c5e47f-1864-493d-b890-9c667bf20a06, abstract = {{<p>We have performed tunnel transport spectroscopy on a quantum dot (QD) molecule proximitized by a superconducting contact. In such a system, the scattering between QD spins and Bogoliubov quasiparticles leads to the formation of Yu-Shiba-Rusinov (YSR) states within the superconducting gap. In this work, we investigate interactions appearing when one- and two-electron spin states in a double-QD energetically align with the superconducting gap edge. We find that the inter-dot spin-triplet state interacts considerably stronger with the superconductor than the corresponding singlet, pointing to stronger screening. By forming a ring molecule with a significant orbital contribution to the effective g-factor, we observe interactions of all four spin-orbital one-electron states with the superconductor under a weak magnetic field.</p>}}, author = {{Potts, Heidi and Aspegren, Markus and Debbarma, Rousan and Lehmann, Sebastian and Thelander, Claes}}, issn = {{0957-4484}}, keywords = {{quantum dot; quantum ring; semiconductor; shiba states; superconductor}}, language = {{eng}}, number = {{13}}, publisher = {{IOP Publishing}}, series = {{Nanotechnology}}, title = {{Large-bias spectroscopy of Yu-Shiba-Rusinov states in a double quantum dot}}, url = {{http://dx.doi.org/10.1088/1361-6528/aca90e}}, doi = {{10.1088/1361-6528/aca90e}}, volume = {{34}}, year = {{2023}}, }