Abstract
A unique superconducting phase where type I and type II superconductivity coexist was seen below 1.7 K in the Dirac semimetal PdTe2. The mixed superconducting phase was attributed to the local variation of the Ginzburg–Landau parameter(κ) in PdTe2. In such a scenario, it is imperative that introduction of disorder would make the system homogeneously type II. Here, we report our study of Point contact Andreev Reflection Spectroscopy on the 4% Cu intercalated PdTe2 single crystals. Cu-intercalates help enhance the critical temperature by donating carriers to the system, and at the same time act as scattering centres thereby reducing the effective κ. Our detailed magnetic field dependent point contact spectroscopy studies show a typical type-II behaviour in Cu-PdTe2. A conventional BTK analysis of the spectra revealed a BCS-like gap Δ0 = 330μeV. With 2Δ0/kBTc=4.25, Cu-PdTe2 falls in the strong coupling regime.
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