Details

Autor(en) / Beteiligte

• Vasdev, Aastha
• Kumar, Ritesh
• Hooda, M.K.
• Yadav, C.S.
• Sheet, Goutam

Titel

Andreev reflection in the enhanced superconducting phase of Cu0.04PdTe2

Ist Teil von

• Solid state communications, 2022-12, Vol.357, p.114952, Article 114952

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. •Mixed type-I and type-II superconducting phase disappears in PdTe2 upon Cu intercalation.•Homogeneous type-II superconducting phase appears in Cu0.04PdTe2.•Critical temperature gets enhanced from 1.7 K to 2.5 K upon intercalation.