標題: Concurrent intersection point of magnetization and magnetoconductivity curves in strongly fluctuating superconductors
作者: Chi, Cheng
Jiang, Xujiang
Wang, Jiangfan
Li, Dingping
Rosenstein, Baruch
電子物理學系
Department of Electrophysics
公開日期: 20-Dec-2017
摘要: The thermal fluctuations contribution to magnetization and magnetoconductivity of type-II layered superconductors is calculated in the framework of the Lawrence-Doniach model. For numerous high-temperature cuprate superconductors, it was discovered that the magnetization dependence on temperature in a wide range of fields exhibits an intersection point at a temperature slightly below Tc. We notice a similar intersection point of the magnetoconductivity curves at the approximate same temperature. The phenomenon is explained by strong (non-Gaussian) thermal fluctuations with interactions treated using a self-consistent theory. All higher Landau levels should be included. Dimensionality of the fluctuations is defined, and the two- to three-dimensional crossover is the key for the existence of intersection points.
URI: http://dx.doi.org/10.1103/PhysRevB.96.224509
http://hdl.handle.net/11536/144259
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.96.224509
期刊: PHYSICAL REVIEW B
Volume: 96
Issue: 22
起始頁: 0
結束頁: 0
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