Nodeless superconductivity in the type-II Dirac semimetal PdTe2 : London penetration depth and pairing-symmetry analysis

  title={Nodeless superconductivity in the type-II Dirac semimetal 
: London penetration depth and pairing-symmetry analysis},
  author={S Teknowijoyo and Na Hyun Jo and Mathias S. Scheurer and Makariy A. Tanatar and Kyuil Cho and Sergei L. Bud'ko and Peter P. Orth and Paul C. Canfield and Ruslan Prozorov},
  journal={Physical Review B},
Superconducting gap structure was probed in type-II Dirac semimetal PdTe$_2$ by measuring the London penetration depth using tunnel diode resonator technique. At low temperatures, the data for two samples are well described by weak coupling exponential fit yielding $\lambda(T=0)=230$~nm as the only fit parameter at a fixed $\Delta(0)/T_c\approx 1.76$, and the calculated superfluid density is consistent with a fully gapped superconducting state characterized by a single gap scale. Electrical… 

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