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Coexistence of type-I and type-II superconductivity in topological superconductor PdTe₂

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arxiv 1910.13773 v1 pith:XJ3YLNJF submitted 2019-10-30 cond-mat.supr-con

Coexistence of type-I and type-II superconductivity in topological superconductor PdTe₂

D. Singh , Pabitra K. Biswas , Sungwon Yoon , C. H. Lee , A. D. Hillier , R. P. Singh , Amit Y. Singh , K.-Y. Choi This is my paper
classification cond-mat.supr-con
keywords superconductivitytype-iiresultssuperconductingtype-ipdte2phasediagram
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The type-II Dirac semimetal PdTe2 was recently reported to be a type-I superconductor with a superconducting transition temperature Tc = 1.65 K. However, the recent results from tunneling and point contact spectroscopy suggested the unusual state of a mixture of type-I and type-II superconductivity. These contradictory results mean that there is no clear picture of the superconducting phase diagram and warrants a detailed investigation of the superconducting phase. We report here the muon spin rotation and relaxation ($\mu$SR) measurements on the superconducting state of the topological Dirac semimetal PdTe2. From $\mu$SR measurements, we find that PdTe2 exhibits mixed type-I/type-II superconductivity. Using these results a phase diagram has been determined. In contrast to previous results where local type-II superconductivity persists up to Hc2 = 600 G, we observed that bulk superconductivity is destroyed above 225 G.

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  1. Type-II superconductivity in the Dirac semimetal PdTe2

    cond-mat.supr-con 2026-04 unverdicted novelty 7.0

    Mosaic crystals of PdTe2 show type-II superconductivity with s-wave gap and flux-line lattice formation due to disorder, contrary to prior type-I reports.