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PreprintCC BY 4.0arXiv

Multiple Andreev Reflection Spectroscopy of Spin-Resolved Proximity States

  • A. A. Golubov
  • M. Yu. Kupriyanov
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Abstract

We predict a coherent multiple Andreev reflection regime in superconducting nanoconstrictions with parallel proximity-induced exchange fields in the electrodes. The subharmonic gap structure is controlled by reconstruction of the spin-resolved electrode spectra, rather than by a rigid displacement of BCS gap edges. This produces split and redistributed anomalies governed by the interval between the outer gap edge and a shifted exchange induced density of states singularity. The effect survives channel transparency averaging and provides a direct transport probe of spin-resolved proximity states.

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Cite

BibTeXRIS
BibTeX
@misc{golubov2026multiple,
  title = {{Multiple Andreev Reflection Spectroscopy of Spin-Resolved Proximity States}},
  author = {A. A. Golubov and M. Yu. Kupriyanov},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.19380},
  eprint = {2609.19380},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.19380},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Multiple Andreev Reflection Spectroscopy of Spin-Resolved Proximity States
AU  - A. A. Golubov
AU  - M. Yu. Kupriyanov
PY  - 2026
DA  - 2026/09/16
PB  - arXiv
DO  - 10.48550/arxiv.2609.19380
UR  - https://arxiv.org/abs/2609.19380
AB  - We predict a coherent multiple Andreev reflection regime in superconducting nanoconstrictions with parallel proximity-induced exchange fields in the electrodes. The subharmonic gap structure is controlled by reconstruction of the spin-resolved electrode spectra, rather than by a rigid displacement of BCS gap edges. This produces split and redistributed anomalies governed by the interval between the outer gap edge and a shifted exchange induced density of states singularity. The effect survives channel transparency averaging and provides a direct transport probe of spin-resolved proximity states.
ER  -