Single-gap versus two-gap scenario: Specific heat and thermodynamic critical field of the noncentrosymmetric superconductor BeAu
Rustem Khasanov, Ritu Gupta, Debarchan Das, Andreas Leithe-Jasper, Eteri Svanidze
DOI 10.1103/PhysRevB.102.014514 · Physical Review B
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Abstract
Temperature evolutions of the electronic specific heat Ce(T) [A. Amon et al., Phys. Rev. B 97, 014501 (2018)] and the thermodynamic critical field Bc(T) [R. Khasanov et al., Phys. Rev. Research 2, 023142 (2020)] of the BeAu superconductor were reconsidered within the framework of the single-gap and two-gap scenarios. The analysis shows that the single-gap approach, by being able to describe satisfactorily the temperature dependence of Ce(T), fails in the case of Bc(T). The self-consistent two-gap model, in contrast, is able to describe both thermodynamic quantities by using a similar set of parameters. Our results imply that in some particular cases, such as in the case of BeAu, measurement of one single thermodynamic quantity may not be enough in order to speculate on the nature of the superconducting pairing mechanism.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BeAu Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.29 | Pressure not reported | unknown |
| BeAu Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.233 | Pressure not reported | unknown |
| MgB2 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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