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arXiv · 1708.06717

Concurrent intersection point of magnetization and magneto-conductivity curves in strongly fluctuating superconductors

Cheng Chi·Xujiang Jiang·Jiangfan Wang·Dingping Li·Baruch Rosenstein
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Abstract

The thermal fluctuations contribution to magnetization and magneto-conductivity of type II layered superconductor is calculated in the framework of Lawrence-Doniach model. For numerous high temperature cuprate superconductors, it was discovered that the magnetization dependence on temperature in wide range of fields exhibits an intersection point at a temperature slightly below $T_{c}$. We notice a similar intersection point of the magneto-conductivity 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 2D-3D dimensional crossover is the key for the existence of intersection points.

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Cheng Chi, Xujiang Jiang, Jiangfan Wang, Dingping Li, Baruch Rosenstein. 2017-11-30. Concurrent intersection point of magnetization and magneto-conductivity curves in strongly fluctuating superconductors. https://doi.org/10.1103/physrevb.96.224509

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