Superconductivity in the topological non-trivial Dirac semimetal PdTe2 was recently shown to be type-I. We here report measurements of the relative magnetic penetration depth, Δλ, on several single crystals using a high precision tunnel diode oscillator technique. The temperature variation Δλ(T) follows an exponential function for T/Tc<0.4, consistent with a fully-gapped superconducting state and weak or moderately coupling superconductivity. By fitting the data we extract a λ(0)-value of ∼500~nm. The normalized superfluid density is in good agreement with the computed curve for a type-I superconductor with nonlocal electrodynamics. Small steps are observed in Δλ(T), which possibly relates to a locally lower Tc due to defects in the single crystalline sample. single crystalline sample.
@article{arxiv.1804.08969,
title = {Penetration depth study of the type-I superconductor PdTe2},
author = {M. V. Salis and P. Rodière and H. Leng and Y. K. Huang and A. de Visser},
journal= {arXiv preprint arXiv:1804.08969},
year = {2018}
}