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説明:

An important route of engineering topological states and excitations is to combine superconductors (SC) with the quantum Hall (QH) effect, and over the past decade, significant progress has been made in this direction. While typical measurements of these states focus on electronic properties, little attention has been paid to the accompanying thermal responses. Here, we examine the thermal properties of the interface between type-II superconducting electrodes and graphene in the QH regime. We use the thermal noise measurement to probe the local electron temperature of the superconductor next to the biased interface. Surprisingly, the measured temperature rise indicates that the superconductor provides a significant thermal conductivity, which is linear in temperature. This suggests electronic heat transport and may be unexpected, because the number of the quasiparticles in the superconductor should be exponentially suppressed. Instead, we attribute the measured electronic heat conductivity to the overlap of the normal states in the vortex cores.

権利情報:

• In Copyright
  

  © 2025 American Physical Society

キーワード: Quantum Hall effect, Superconductor-graphene interface, Thermal conductivity

刊行年月日: 2025-02-12

出版者: American Physical Society (APS)

掲載誌:

• Physical Review Letters (ISSN: 10797114) vol. 134 issue. 6 066001

研究助成金:

• Division of Materials Sciences and Engineering
• U.S. Department of Energy DE-SC0002765
• Ministry of Education, Culture, Sports, Science and Technology JPMXP0112101001
• Japan Society for the Promotion of Science JP20H00354
• Core Research for Evolutional Science and Technology JPMJCR15F3
• Japan Science and Technology Agency

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1103/PhysRevLett.134.066001

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更新時刻: 2026-07-06 11:07:25 +0900

MDRでの公開時刻: 2026-07-06 12:30:06 +0900