2020/04/08 by Arushi, D. Singh, Pabitra Kumar Biswas⃰ +3
Chemistry · Materials Science · Physics and Astronomy · #Condensed matter physics #Critical field #Inorganic Chemistry and Materials #Iron-based superconductors research #Magnetic field #Magnetization #Materials science #Muon spin spectroscopy #Paramagnetism #Pauli exclusion principle #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.101.144508
10 Pages, 7 Figures Accepted: Physical Review B
arxiv created 2020/04/08 · openalex created_date 2020/04/17 · openalex publication_date 2020/04/28 · arxiv updated 2020/05/20 · openalex updated_date 2026/08/05
Rhenium based noncentrosymmetric superconductors crystallizing in \ensuremathα-Mn structure have become potential candidates to exhibit an unconventional superconducting ground state. Here we report a detailed investigation on the superconducting and normal state properties of Re5.5Ta, that also has the \ensuremathα-Mn structure. Magnetization, specific heat, and transport measurements confirm the bulk superconducting transition TC at 8.0 K. Upper critical field value [HC2(0)] calculated from magnetization, specific heat, and AC transport measurements exceed the Pauli paramagnetic limit (14.7 T), indicating that the superconducting properties of Re5.5Ta are probably unconventional in nature. However, low-temperature specific heat and transverse-field muon spin rotation measurements suggest a surprising nodeless isotropic superconducting gap, although with strong electron-phonon coupling.