Field-resolved hierarchy of superconducting energy gaps in PdTe
Abstract
Resolving how multiple superconducting energy scales evolve under magnetic field is important for distinguishing multiband, anisotropic, and surface-sensitive superconducting responses. Here, we investigate the superconducting state of PdTe using low-temperature soft point-contact spectroscopy in a sealed 3He immersion environment. The resulting Andreev-reflection spectra reveal two characteristic superconducting energy scales near 0.5 and 1.1 meV that are not adequately described by a single-gap BTK model. Both energy scales are progressively suppressed upon warming toward the same superconducting transition temperature Tc. In contrast, their magnetic-field evolution reveals two distinct characteristic fields near 4.5 and 7.5 kG. The lower scale is associated with the loss of the zero-resistance superconducting state, whereas the higher-energy spectroscopic response persists to substantially larger fields. Independent field-dependent gap analysis yields suppression scales consistent with those identified from the zero-bias conductance. These results reveal a field-resolved hierarchy of superconducting energy scales in PdTe and indicate superconducting responses with distinct magnetic-field robustness.
Related
- Band-Resolved Superconducting Gaps via the Thermal Hall Effect in CeRu2
- Point-contact spectroscopy of electron-phonon interactions and anisotropy of superconducting energy gaps in 2H−NbSe2
- LLMs Can Tackle High Energy Theoretical Physics, yet Gaps Remain: Part I, Quantum Field Theory
- Energy-Resolved Cross-Correlation of THz Field Emission of Electrons from a Metal Nanotip
- Symmetry-resolved superconducting diode response
BibTeX
@misc{lee2026fieldresolved,
title = {{Field-resolved hierarchy of superconducting energy gaps in PdTe}},
author = {Sangyun Lee and A. M. Donald and D. Duong and S. Huang and R. Gazizulin and C. Huan and Rongying Jin},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12075},
eprint = {2610.12075},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12075},
}
RIS
TY - UNPB
TI - Field-resolved hierarchy of superconducting energy gaps in PdTe
AU - Sangyun Lee
AU - A. M. Donald
AU - D. Duong
AU - S. Huang
AU - R. Gazizulin
AU - C. Huan
AU - Rongying Jin
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.12075
UR - https://arxiv.org/abs/2610.12075
AB - Resolving how multiple superconducting energy scales evolve under magnetic field is important for distinguishing multiband, anisotropic, and surface-sensitive superconducting responses. Here, we investigate the superconducting state of PdTe using low-temperature soft point-contact spectroscopy in a sealed ^3He immersion environment. The resulting Andreev-reflection spectra reveal two characteristic superconducting energy scales near 0.5 and 1.1 meV that are not adequately described by a single-gap BTK model. Both energy scales are progressively suppressed upon warming toward the same superconducting transition temperature T_c. In contrast, their magnetic-field evolution reveals two distinct characteristic fields near 4.5 and 7.5 kG. The lower scale is associated with the loss of the zero-resistance superconducting state, whereas the higher-energy spectroscopic response persists to substantially larger fields. Independent field-dependent gap analysis yields suppression scales consistent with those identified from the zero-bias conductance. These results reveal a field-resolved hierarchy of superconducting energy scales in PdTe and indicate superconducting responses with distinct magnetic-field robustness.
ER -