Heat capacity evidence for conventional superconductivity in the type-II Dirac semimetal PdTe 2

Abstract

We use electrical transport, magnetoresistance, and heat capacity measurements on high quality single crystals of the recently discovered superconducting type-II Dirac semimetal PdTe2, to probe the nature of its superconducting phase. The magnitude of the electronic heat-capacity anomaly at Tc, the low temperature exponential T dependence of the heat capacity, the linear H dependence of the T=0 electronic Sommerfeld coefficient, and a conventional H-T phase diagram establish that the superconductivity in PdTe2 is conventional in nature despite the presence of a topologically nontrivial Fermi surface band, which contributes to the electrical conduction