Enhanced superconducting-fluctuation effects on thermodynamic properties in BCS-BEC-crossover regime
arXiv:1709.02553 · doi:10.1103/PhysRevB.96.184507
Abstract
Effects of superconducting fluctuation (SCF) on thermodynamic properties of electron systems in the so-called BCS-BEC-crossover regime are studied. As the attractive interaction between electrons becomes stronger upon approaching the BCS-BEC-crossover regime, importance of the mode coupling between SCF drastically increases. The enhanced mode coupling leads to lowering of both the zero-field superconducting critical temperature and the depairing field . Consequently, SCF-induced contributions to the specific heat and the diamagnetic susceptibility can seemingly exceed the corresponding values in the Gaussian approximation. We discuss relevance of the present results to the anomalous SCF-induced diamagnetic response observed in the iron selenide (FeSe).
arXiv comment12 pages, 14 figures
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Cited by in corpus (5)
- Bulk superconductivity and role of fluctuations in the iron-based superconductor FeSe at high pressures
- Superconducting fluctuation in FeSe investigated by precise torque magnetometry
- Dimensionality-induced BCS-BEC crossover in layered superconductors
- Vortex Lattice Melting Line in Superconductors with Paramagnetic Pair-Breaking
- Stabilization of vortex-liquid state by strong pairing interaction