Unconventional superconducting properties of noncentrosymmetric Re5.5Ta
Arushi, D. Singh, P. K. Biswas, A. D. Hillier, R. P. Singh
DOI 10.1103/PhysRevB.101.144508 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Rhenium based noncentrosymmetric superconductors crystallizing in α-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 α-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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Re5.5Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.06 | Pressure not reported | onset |
| Re5.5Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | midpoint |
| Re5.5Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
| Re5.5Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.9 | Pressure not reported | unknown |
| Re3W Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Re3Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Re24Ti5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Unconventional properties of the noncentrosymmetric superconductor Re8NbTa
similarity 0.95R. K. Kushwaha et al.
Source status unknown — claims are unverified
Superconducting and structural properties of the noncentrosymmetric Re6Hf superconductor under high pressure
similarity 0.93Sathiskumar Mariappan et al.
Source status unknown — claims are unverified
Superconducting properties of the noncentrosymmetric superconductor Re6Hf
similarity 0.93D. Singh et al.
Source status unknown — claims are unverified
Time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Ti
similarity 0.92D. Singh et al.
Source status unknown — claims are unverified
Time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Hf: Further evidence for unconventional behavior in the α-Mn family of materials
similarity 0.92D. Singh et al.
Source status unknown — claims are unverified
Structure and superconductivity of two different phases of Re3W
similarity 0.91P. K. Biswas et al.
Source status unknown — claims are unverified