论文标题
单一和两间隙方案：Beau超导体的特定热量和热力学临界场
The single- vs. two-gap scenario: the specific heat and the thermodynamic critical field of BeAu superconductor
论文作者
论文摘要
讨论了一些热力学数量需要单个间隙描述，而另一些则需要更复杂的差距方案的令人困惑的情况。我们的方法表明，在某些情况下，基于仅热力学数量的测量的结论可能会导致结果相互矛盾。例如，Beau超导体的电子特异性热[$ c _ {\ rm e}（t）$]和热力学关键场[$ b _ {\ rm c}（t）$]的温度演变在单个框架的框架内重新考虑了Beau超导体的Beau超导体的温度发展。分析表明，单间隙方法描述了$ c _ {\ rm e}（t）$的温度依赖性和superfluid密度$ρ_{\ rm s}（t）$令人满意。但是，在$ b _ {\ rm c}（t）$的情况下，它失败了。相比之下，自洽的两间隙模型能够通过使用一组类似的参数来描述所有上述热力学量。我们的结果表明，与超导配对机制有关的热力学数量的正确描述需要使用包含相同参数集的相似模型。
The puzzling situation where some thermodynamic quantities require a single-gap description, while others need a more complex gap scenario, is discussed. Our approach reveals that in some cases, the conclusions based on measurements of only one thermodynamic quantity may lead to conflicting results. As an example, temperature evolutions of the electronic specific heat [$C_{\rm e}(T)$] and the thermodynamic critical field [$B_{\rm c}(T)$] of BeAu superconductor were reconsidered within the framework of the single-gap and the two-gap scenarios. The analysis shows that the single-gap approach describes the temperature dependencies of $C_{\rm e}(T)$ and the superfluid density $ρ_{\rm s}(T)$ satisfactorily. However it fails in the case of $B_{\rm c}(T)$. The self-consistent two-gap model, in contrast, is able to describe all of the mentioned thermodynamic quantities by using a similar set of parameters. Our results reveal that a proper description of the thermodynamic quantities, related to the superconducting pairing mechanism, requires the use of similar model containing the same set of parameters.
