Evidence for multiple superconducting gaps in the filled skutterudite compound LaRu4As12
Lukasz Bochenek, Ryszard Wawryk, Zygmunt Henkie, Tomasz Cichorek
DOI 10.1103/PhysRevB.86.060511 · 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
Superconducting properties of the filled skutterudite compound LaRu4As12 were investigated both as a function of temperature and magnetic field. At T≪Tc=10.45 K, the electronic contribution to the specific heat was found to be at variance with the predictions for an s-wave superconductor with one energy gap. In constant applied fields up to Hc2(0)≈10.2 T, multiple gaps have been further inferred from both a nonlinear magnetic-field dependence of the specific heat in the zero-temperature limit and a positive curvature of the upper critical field in the vicinity of Tc. Thus, LaRu4As12 appears to be a rare multiple-gap superconductor with cubic symmetry. Intriguing evidence for multiband effects is observed in the compound with enhanced superconducting properties as compared to other skutterudite superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaRu4As12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.45 | Pressure not reported | onset |
| LaRu4As12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.42 | Pressure not reported | midpoint |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
| PrRu4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaOs4As12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.2 | Pressure not reported | unknown |
| LaRu4P12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.3 | Pressure not reported | unknown |
Similar papers
Multigap superconductivity in the filled-skutterudite compound LaRu4As12 probed by muon spin rotation
similarity 0.95A. Bhattacharyya et al.
Source status unknown — claims are unverified
Superconductivity in the ternary germanide La3Pd4Ge4
similarity 0.95H. Fujii et al.
Source status unknown — claims are unverified
High magnetic field superconductivity in a two-band superconductor
similarity 0.94Tancredi Salamone et al.
Source status unknown — claims are unverified
Suppression of anharmonic phonons and s-wave superconductivity by defects in the filled skutterudite LaRu4As12
similarity 0.94Y. Mizukami et al.
Source status unknown — claims are unverified
Multiband s-wave topological superconductors: Role of dimensionality and magnetic field response
similarity 0.94Shusa Deng et al.
Source status unknown — claims are unverified
Superconductivity of filled skutterudites LaRu4As12 and PrRu4As12
similarity 0.94Ichimin Shirotani et al.
Source status unknown — claims are unverified