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首页> 外文期刊>Physical review >Vortex-dynamics Approach To The Nernst Effect In Extreme Type-ii Superconductorsdominated By Phase Fluctuations
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Vortex-dynamics Approach To The Nernst Effect In Extreme Type-ii Superconductorsdominated By Phase Fluctuations

机译:用涡旋动力学方法研究以相位波动为主的第二类超导体的能斯特效应

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摘要

We present a method to study the Nernst effect and diamagnetism of an extreme type-II superconductor dominated by phase fluctuations. We work directly with vortex variables and our method allows us to tune vortex parameters (e.g., core energy and number of vortex species). We find that diamagnetic response and transverse thermoelectric conductivity (α_(xy)) persist well above the Kosterlitz-Thouless transition temperature, and become more pronounced as the vortex core energy is increased. However, they weaken as the number of internal vortex states is increased. We find that α_(xy) closely tracks the magnetization (-M/T) over a wide range of parameters.
机译:我们提出一种方法来研究由相位波动主导的极端II型超导体的能斯特效应和反磁性。我们直接处理涡旋变量,并且我们的方法允许我们调整涡旋参数(例如核心能量和涡旋种类的数量)。我们发现,反磁响应和横向热导率(α_(xy))在Kosterlitz-Thouless转变温度以上持续存在,并随着涡旋核心能量的增加而变得更加明显。但是,随着内部涡旋状态数量的增加,它们减弱。我们发现,α_(xy)在很宽的参数范围内紧密跟踪磁化强度(-M / T)。

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