We have fabricated superconductor-normal metal side-junctions with different barrier transparencies out of PdTe2 crystalline flakes and measured the differential conductance spectra. Modeling our measurements using a modified Blonder Tinkham Klapwijk (BTK) formalism confirms that the superconductivity is mostly comprised of the conventional s-wave symmetry. We have found that for junctions with very low barrier transparencies, the junctions can enter a thermal regime, where the critical current becomes important. Adding this to the BTK-model allows us to accurately fit the experimental data, from which we conclude that the superconductivity in the a-b plane of PdTe2 is dominated by conventional s-wave pairing.
@article{arxiv.1901.04227,
title = {Dominant $s$-wave superconducting gap in PdTe$_2$ observed by tunneling spectroscopy on side-junctions},
author = {J. A. Voerman and J. C. de Boer and T. Hashimoto and Yingkai Huang and Chuan Li and A. Brinkman},
journal= {arXiv preprint arXiv:1901.04227},
year = {2019}
}