Low-Temperature Magnetothermal Transport Investigation of a Ni-Based Superconductor BaNi2As2: Evidence for Fully Gapped Superconductivity
N. Kurita, F. Ronning, Y. Tokiwa, E. D. Bauer, A. Subedi, D. J. Singh, J. D. Thompson, R. Movshovich
DOI 10.1103/PhysRevLett.102.147004 · Physical Review Letters
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Abstract
We have performed low-temperature specific heat and thermal conductivity measurements of the Ni-based superconductor BaNi2As2 (Tc=0.7 K) in a magnetic field. In a zero field, thermal conductivity shows T-linear behavior in the normal state and exhibits a BCS-like exponential decrease below Tc. The field dependence of the residual thermal conductivity extrapolated to zero temperature is indicative of a fully gapped superconductor. This conclusion is supported by the analysis of the specific heat data, which are well fit by the BCS temperature dependence from Tc down to the lowest temperature of 0.1 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | unknown |
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.68 | Pressure not reported | midpoint |
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | unknown |
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