Evidence of double-gap superconductivity in noncentrosymmetric Nb0.18Re0.82 single crystals
C. Cirillo, R. Fittipaldi, M. Smidman, G. Carapella, C. Attanasio, A. Vecchione, R. P. Singh, M. R. Lees, G. Balakrishnan, M. Cuoco
DOI 10.1103/PhysRevB.91.134508 · 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
We combine point contact spectroscopy with specific heat measurements to probe the superconducting state in noncentrosymmetric Nb0.18Re0.82 single crystals. The conductance spectra clearly exhibit a two-peak structure that is well reproduced within a two-band model with isotropic gaps in the spectrum. Such an observation is confirmed by distinct features of the specific heat both at low temperatures and in the range approaching the transition to the normal state. The analyses provide convincing evidence that the two-gap superconducting pairing is a robust feature of Nb0.18Re0.82.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb0.18Re0.82 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure not reported | onset |
| Nb0.18Re0.82 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure not reported | unknown |
| NbxRe1-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.8 | Pressure not reported | unknown |
| CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Re6Zr Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BiPd Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
BCS-like superconductivity in the noncentrosymmetric compounds NbxRe1−x (0.13≤x≤0.38)
similarity 0.96J. Chen et al.
Source status unknown — claims are unverified
Enhanced triplet superconductivity in noncentrosymmetric systems
similarity 0.95Takehito Yokoyama et al.
Source status unknown — claims are unverified
Tunneling between noncentrosymmetric superconductors with significant spin-orbit splitting studied theoretically within a two-band treatment
similarity 0.95K. Børkje & A. Sudbø
Source status unknown — claims are unverified
Anomalous pressure dependence of the superconductivity in noncentrosymmetric LaNiC2: Evidence of strong electronic correlations
similarity 0.94Susumu Katano et al.
Source status unknown — claims are unverified
Spin currents and spontaneous magnetization at twin boundaries of noncentrosymmetric superconductors
similarity 0.94Emiko Arahata et al.
Source status unknown — claims are unverified
Antiferromagnetic spin fluctuations and superconductivity in NbRh2B2 and TaRh2B2 with a chiral crystal structure
similarity 0.94Kazuaki Matano et al.
Source status unknown — claims are unverified