Magnetic-field-induced transition in a quantum dot coupled to a superconductor

Research output: Contribution to journal › Journal article › Research › peer-review

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Magnetic-field-induced transition in a quantum dot coupled to a superconductor. / Corral, A. Garcia; van Zanten, D. M. T.; Franke, K. J.; Courtois, H.; Florens, S.; Winkelmann, C. B.

In: Physical Review Research, Vol. 2, No. 1, 012065, 16.03.2020.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Corral, AG, van Zanten, DMT, Franke, KJ, Courtois, H, Florens, S & Winkelmann, CB 2020, 'Magnetic-field-induced transition in a quantum dot coupled to a superconductor', Physical Review Research, vol. 2, no. 1, 012065. https://doi.org/10.1103/PhysRevResearch.2.012065

APA

Corral, A. G., van Zanten, D. M. T., Franke, K. J., Courtois, H., Florens, S., & Winkelmann, C. B. (2020). Magnetic-field-induced transition in a quantum dot coupled to a superconductor. Physical Review Research, 2(1), [012065]. https://doi.org/10.1103/PhysRevResearch.2.012065

Vancouver

Corral AG, van Zanten DMT, Franke KJ, Courtois H, Florens S, Winkelmann CB. Magnetic-field-induced transition in a quantum dot coupled to a superconductor. Physical Review Research. 2020 Mar 16;2(1). 012065. https://doi.org/10.1103/PhysRevResearch.2.012065

Author

Corral, A. Garcia ; van Zanten, D. M. T. ; Franke, K. J. ; Courtois, H. ; Florens, S. ; Winkelmann, C. B. / Magnetic-field-induced transition in a quantum dot coupled to a superconductor. In: Physical Review Research. 2020 ; Vol. 2, No. 1.

Bibtex

@article{fd85dde3f3e94569a7df9ff1c822127b,
title = "Magnetic-field-induced transition in a quantum dot coupled to a superconductor",
abstract = "The magnetic moment of a quantum dot can be screened by its coupling to a superconducting reservoir, depending on the hierarchy of the superconducting gap and the relevant Kondo scale. This screening-unscreening transition can be driven by electrostatic gating, tunnel coupling, and, as we demonstrate here, a magnetic field. We perform high-resolution spectroscopy of subgap excitations near the screening-unscreening transition of asymmetric superconductor-quantum dot-superconductor (S-QD-S) junctions formed by the electromigration technique. Our measurements reveal a re-entrant phase boundary determined by the competition between Zeeman energy and gap reduction with magnetic field. We further track the evolution of the phase transition with increasing temperature, which is also evinced by thermal replicas of subgap states.",
keywords = "STATES",
author = "Corral, {A. Garcia} and {van Zanten}, {D. M. T.} and Franke, {K. J.} and H. Courtois and S. Florens and Winkelmann, {C. B.}",
year = "2020",
month = mar,
day = "16",
doi = "10.1103/PhysRevResearch.2.012065",
language = "English",
volume = "2",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "AMER PHYSICAL SOC",
number = "1",

}

RIS

TY - JOUR

T1 - Magnetic-field-induced transition in a quantum dot coupled to a superconductor

AU - Corral, A. Garcia

AU - van Zanten, D. M. T.

AU - Franke, K. J.

AU - Courtois, H.

AU - Florens, S.

AU - Winkelmann, C. B.

PY - 2020/3/16

Y1 - 2020/3/16

N2 - The magnetic moment of a quantum dot can be screened by its coupling to a superconducting reservoir, depending on the hierarchy of the superconducting gap and the relevant Kondo scale. This screening-unscreening transition can be driven by electrostatic gating, tunnel coupling, and, as we demonstrate here, a magnetic field. We perform high-resolution spectroscopy of subgap excitations near the screening-unscreening transition of asymmetric superconductor-quantum dot-superconductor (S-QD-S) junctions formed by the electromigration technique. Our measurements reveal a re-entrant phase boundary determined by the competition between Zeeman energy and gap reduction with magnetic field. We further track the evolution of the phase transition with increasing temperature, which is also evinced by thermal replicas of subgap states.

AB - The magnetic moment of a quantum dot can be screened by its coupling to a superconducting reservoir, depending on the hierarchy of the superconducting gap and the relevant Kondo scale. This screening-unscreening transition can be driven by electrostatic gating, tunnel coupling, and, as we demonstrate here, a magnetic field. We perform high-resolution spectroscopy of subgap excitations near the screening-unscreening transition of asymmetric superconductor-quantum dot-superconductor (S-QD-S) junctions formed by the electromigration technique. Our measurements reveal a re-entrant phase boundary determined by the competition between Zeeman energy and gap reduction with magnetic field. We further track the evolution of the phase transition with increasing temperature, which is also evinced by thermal replicas of subgap states.

KW - STATES

U2 - 10.1103/PhysRevResearch.2.012065

DO - 10.1103/PhysRevResearch.2.012065

M3 - Journal article

VL - 2

JO - Physical Review Research

JF - Physical Review Research

SN - 2643-1564

IS - 1

M1 - 012065

ER -

ID: 255160260