Anisotropy of upper critical field and surface superconducting state in the intermediate-valence superconductor CeIr3

Yoshiki J. Sato, Fuminori Honda, Yusei Shimizu, Ai Nakamura, Yoshiya Homma, Arvind Maurya, Dexin Li, Takatsugu Koizumi, Dai Aoki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

CeIr3 is a Ce-based superconductor with a superconducting transition temperature Tc=3.4 K in an intermediate-valence state. We grew high-quality single crystals of CeIr3 using the Czochralski method, and measured the electrical resistivity, magnetic torque, and specific heat. The anisotropy of the superconducting upper critical field Hc2 was determined. The temperature dependence of Hc2, obtained from the resistivity measurements, suggests the multiband character of the superconductivity in CeIr3. Different field-angle dependencies of Hc2 in electrical transport and thermodynamic measurements indicate the robust surface effect in the bulk superconductivity of CeIr3. We analyzed the surface superconductivity based on simple models to reveal the bulk superconducting properties. Our results support the isotropic bulk superconducting state and robust surface superconductivity in CeIr3 single crystals.

Original languageEnglish
Article number174503
JournalPhysical Review B
Volume102
Issue number17
DOIs
Publication statusPublished - 2020 Nov 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Anisotropy of upper critical field and surface superconducting state in the intermediate-valence superconductor CeIr3'. Together they form a unique fingerprint.

Cite this