Unconventional properties of the noncentrosymmetric superconductor Re8NbTa
R. K. Kushwaha, Arushi, S. Sharma, S. Srivastava, P. K. Meena, M. Pula, J. Beare, J. Gautreau, A. D. Hillier, G. M. Luke, R. P. Singh
DOI 10.1103/PhysRevB.109.174518 · Physical Review B
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Abstract
Re-based superconductors provide a rich platform for the study of unconventional superconductivity. We have investigated the superconducting properties of Re8NbTa, a new noncentrosymmetric cubic (α-Mn structure) rhenium-based ternary superconductor using transport, magnetization, specific-heat, and muon-spin rotation/relaxation (μSR) measurements. Specific-heat and transverse field μSR measurements suggest moderately coupled fully gapped superconductivity, well described by BCS theory. However, our zero-field μSR measurements reveal a small internal field onsetting around the superconducting Tc, indicating the unconventional superconducting ground state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Re8NbTa Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.1 | Pressure not reported | zero_resistance |
| Re8NbTa Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.7 | Pressure not reported | onset |
| Re8NbTa Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.5 | Pressure not reported | midpoint |
| CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La7Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La7Ir3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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