Thermal bottleneck in a freely suspended superconducting island on InAs nanowire

@misc{shpagina2026thermal,
  title = {{Thermal bottleneck in a freely suspended superconducting island on InAs nanowire}},
  author = {E. V. Shpagina and E. S. Tikhonov and D. Ruhstorfer and G. Koblmueller and V. S. Khrapai},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2605.03139},
  eprint = {2605.03139},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.03139},
}

TY  - UNPB
TI  - Thermal bottleneck in a freely suspended superconducting island on InAs nanowire
AU  - E. V. Shpagina
AU  - E. S. Tikhonov
AU  - D. Ruhstorfer
AU  - G. Koblmueller
AU  - V. S. Khrapai
PY  - 2026
DA  - 2026/11/05
PB  - arXiv
DO  - 10.48550/arxiv.2605.03139
UR  - https://arxiv.org/abs/2605.03139
AB  - We investigate the heat balance in superconducting islands (S-islands) formed in epitaxial Al/InAs nanowires (NWs) freely suspended above the substrate. We employ a Joule spectroscopy approach, which traces the superconductor-normal transition in the S-island mediated by heating of the neighboring InAs NW segments via transport current. The temperature of the surrounding 3He bath is varied with nearby mesoscopic heaters and controlled with the NW Johnson noise thermometry. The experiment reveals a substantial thermal relaxation bottleneck associated with the cooling via surrounding 3He, which gives rise to phonon heating in the S-island. Our results uncover the role of environmental cooling in non-equilibrium experiments in S-islands in NW devices.
ER  -