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PreprintarXiv licencearXiv

Band-Resolved Superconducting Gaps via the Thermal Hall Effect in CeRu2

  • Darian Hall
  • Luke Pritchard Cairns
  • Nico Rowland
  • Yuanqi Lyu
  • Kohtaro Yamakawa
  • Josue Rodriguez
  • Kirin Chanteloup
  • Didier Perrodin
  • Joel E. Moore
  • James G. Analytis
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Abstract

Standard bulk probes of multiband superconductors cannot assign pairing gaps to specific electron or hole Fermi surfaces. Here we show that thermal Hall transport (κxy), constrained by specific heat and normal-state magnetotransport, resolves this ambiguity in the compensated heavy-fermion superconductor CeRu2. Fixing the gap magnitudes (Δe/kB≈ 13K, Δh/kB≈ 8K) and band mobilities completely determines the electronic degrees of freedom in κxx and κxy. A low-field sign reversal in κxy places the larger gap on the heavy Ce 4f electron sheets and the smaller on the hole sheets.

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Cite

BibTeXRIS
BibTeX
@misc{hall2026bandresolved,
  title = {{Band-Resolved Superconducting Gaps via the Thermal Hall Effect in CeRu2}},
  author = {Darian Hall and Luke Pritchard Cairns and Nico Rowland and Yuanqi Lyu and Kohtaro Yamakawa and Josue Rodriguez and Kirin Chanteloup and Didier Perrodin and Joel E. Moore and James G. Analytis},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.22361},
  eprint = {2610.22361},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.22361},
}
RIS
TY  - UNPB
TI  - Band-Resolved Superconducting Gaps via the Thermal Hall Effect in CeRu2
AU  - Darian Hall
AU  - Luke Pritchard Cairns
AU  - Nico Rowland
AU  - Yuanqi Lyu
AU  - Kohtaro Yamakawa
AU  - Josue Rodriguez
AU  - Kirin Chanteloup
AU  - Didier Perrodin
AU  - Joel E. Moore
AU  - James G. Analytis
PY  - 2026
DA  - 2026/10/15
PB  - arXiv
DO  - 10.48550/arxiv.2610.22361
UR  - https://arxiv.org/abs/2610.22361
AB  - Standard bulk probes of multiband superconductors cannot assign pairing gaps to specific electron or hole Fermi surfaces. Here we show that thermal Hall transport (κ_xy), constrained by specific heat and normal-state magnetotransport, resolves this ambiguity in the compensated heavy-fermion superconductor CeRu_2. Fixing the gap magnitudes (Δ_e/k_B≈ 13K, Δ_h/k_B≈ 8K) and band mobilities completely determines the electronic degrees of freedom in κ_xx and κ_xy. A low-field sign reversal in κ_xy places the larger gap on the heavy Ce 4f electron sheets and the smaller on the hole sheets.
ER  -