Penetration depth study of the type-I superconductor PdTe2

M V Salis; P Rodière; H Leng; Y K Huang; A de Visser

doi:10.1088/1361-648X/aaed31

Penetration depth study of the type-I superconductor PdTe₂

J Phys Condens Matter. 2018 Dec 19;30(50):505602. doi: 10.1088/1361-648X/aaed31.

Authors

M V Salis¹, P Rodière, H Leng, Y K Huang, A de Visser

Affiliation

¹ Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.

PMID: 30474615
DOI: 10.1088/1361-648X/aaed31

Abstract

Superconductivity in the topological non-trivial Dirac semimetal PdTe₂ was recently shown to be type-I. We hereby report measurements of the relative magnetic penetration depth, [Formula: see text], on several single crystals using a high precision tunnel diode oscillator technique. The temperature variation [Formula: see text] follows an exponential function for [Formula: see text], consistent with a fully-gapped superconducting state and weak or moderately coupling superconductivity. By fitting the data we extract a [Formula: see text]-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 [Formula: see text], which possibly relates to a locally lower [Formula: see text] due to defects in the single crystalline sample.