2000/12/22 by Joonhyun Yeo, M. A. Moore · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.64.024514
9 pages, 5 figures
arxiv created 2000/12/22 · openalex publication_date 2001/06/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate various thermodynamic quantities of vortex liquids in a layered superconductor by using the nonperturbative parquet-approximation method, which was previously used to study the effect of thermal fluctuations in two-dimensional vortex systems. We find there is a first-order transition between two vortex liquid phases that differ in the magnitude of their correlation lengths. As the coupling between the layers increases, the first-order transition line ends at a critical point. We discuss the possible relation between this critical end point and the disappearance of the first-order transition that is observed in experiments on high-temperature superconductors at low magnetic fields.