中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(8) ：3-13.DOI:10.1007/s11433-024-2382-1

Anomalous negative magnetoresistance in quantum dot Josephson junctions with Kondo correlations

Mingtang Deng Chunlin Yu Guangyao Huang Rosa López Philippe Caroff Sepideh Ghalamestani Gloria Platero Hongqi Xu
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(8) ：3-13.DOI:10.1007/s11433-024-2382-1
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Anomalous negative magnetoresistance in quantum dot Josephson junctions with Kondo correlations

Mingtang Deng 1Chunlin Yu 2Guangyao Huang 3Rosa López 4Philippe Caroff 5Sepideh Ghalamestani 5Gloria Platero 6Hongqi Xu7
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作者信息

  • 1. Institute for Quantum Information & State Key Laboratory of High Performance Computing,College of Computer Science and Technology,National University of Defense Technology,Changsha 410073,China;NanoLund and Division of Solid State Physics,Lund University,Lund S-22100,Sweden;Hefei National Laboratory Hefei 230088,China
  • 2. NanoLund and Division of Solid State Physics,Lund University,Lund S-22100,Sweden;China Greatwall Quantum Laboratory,Changsha 410006,China
  • 3. Institute for Quantum Information & State Key Laboratory of High Performance Computing,College of Computer Science and Technology,National University of Defense Technology,Changsha 410073,China
  • 4. Institut de Física Interdisciplinària i de Sistemes Complexos IFISC,Palma de Mallorca E-07122,Spain
  • 5. NanoLund and Division of Solid State Physics,Lund University,Lund S-22100,Sweden
  • 6. lnstituto de Ciencia de Materiales de Madrid,Madrid 28049,Spain
  • 7. NanoLund and Division of Solid State Physics,Lund University,Lund S-22100,Sweden;Beijing Key Laboratory of Quantum Devices,Key Laboratory for the Physics and Chemistry of Nanodevices,and Department of Electronics,Peking University,Beijing 100871,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China
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Abstract

The interplay between superconductivity and the Kondo effect has stimulated significant interest in condensed matter physics.They compete when their critical temperatures are close and can give rise to a quantum phase transition that can mimic Majo-rana zero modes.Here,we have fabricated and measured Al-InSb nanowire quantum dot-Al devices.In the Kondo regime,a supercurrent-induced zero-bias conductance peak emerges.This zero-bias peak shows an anomalous negative magnetoresistance(NMR)at weak magnetic fields.We attribute this anomalous NMR to quasiparticle trapping at vortices in the superconductor leads as a weak magnetic field is applied.The trapping effect lowers the quasiparticle-caused dissipation and thus enhances the Josephson current.This work connects the vortex physics and the supercurrent tunneling in Kondo regimes and can help further understand the physics of Josephson quantum dot system.

Key words

quantum dot/Kondo correlation/InSb nanowire/quasiparticle trapping

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基金项目

Swedish Research Council(VR)()

National Natural Science Foundation of China(92165208)

National Natural Science Foundation of China(11874071)

National Natural Science Foundation of China(91221202)

National Natural Science Foundation of China(91421303)

National Natural Science Foundation of China(11904399)

National Key Research and Development Program of China(2016YFA0300601)

National Key Research and Development Program of China(2017YFA0303304)

Beijing Academy of Quantum Information Sciences(Y18G22)

Hunan Provincial Science Foundation for Distinguished Young Scholars(2021J J10043)

Innovation Program for Quantum Science and Technology(2021ZD0302401)

Spanish Ministry of Economy and Competitiveness(PID2020-117347GB-100)

Mara de Maeztu project(CEX2021-001164-M)

Mara de Maeztu project(MCIN/AEI/10.13039/501100011033)

Spanish Ministry of Economy and Competitiveness(PID2020-11778GB-I00)

CSIC Research Platform PTI-001 and through the grant LINKB20072(CSIC)()

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
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