PdTe has recently been reported to be a type-II Dirac semimetal while a bulk nodal and surface nodeless superconductivity (SC) has been claimed to coexist. In this work, we applied point-contact spectroscopy (PCS) method to systematically study the superconducting gap in PdTe single crystals with a SC transition temperature Tc=4.3 K. The obtained differential conductance curves show a common deviation from a single-gap superconducting behavior and can be better fitted by a two-gap Blonder-Tinkham-Klapwijk model, suggesting the larger gap ΔL with 2ΔL=3.7 kBTc and the smaller gap ΔS yielding 2ΔS=1.1-2.2 kBTc with a weak interband scattering. The variations of conductance spectra among different contacts are proposed to be caused by the anisotropy of Fermi surface topology associated with different gaps.
@article{arxiv.2601.04712,
title = {Multigap nodeless superconductivity in Dirac semimetal PdTe},
author = {Fengrui Shi and Weilong Qiu and Chufan Chen and Chunqiang Xu and Yan Zhang and Hao Zheng and Yuwei Zhou and Dongting Zhang and Mengwei Xie and Huiqiu Yuan and Shiyan Li and Yang Liu and Chao Cao and Xiaofeng Xu and Xin Lu},
journal= {arXiv preprint arXiv:2601.04712},
year = {2026}
}