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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Random resistivity network calculations for cuprate superconductors with an electronic phase separation transition
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Random resistivity network calculations for cuprate superconductors with an electronic phase separation transition

机译:具有电子相分离跃迁的铜酸盐超导体的随机电阻率网络计算

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摘要

The resistivity as a function of temperature for high temperature superconductors is very unusual and, despite its importance, lacks a unified theoretical explanation. It is linear with the temperature for overdoped compounds but it falls more quickly as the doping level decreases. The resistivity of underdoped cuprates increases like that of an insulator below a characteristic temperature where it shows a minimum. We show that this overall behavior can be explained by calculations using an electronic phase segregation into two main component phases with low and high electronic densities. The total resistance is calculated from the various contributions through several processes of random picking of the local resistivities and using a common statistical random resistor network approach.
机译:对于高温超导体,电阻率随温度变化是很不寻常的,尽管它很重要,但缺乏统一的理论解释。它与过量掺杂的化合物的温度成线性关系,但随着掺杂水平的降低,下降速度更快。掺杂剂不足的铜酸盐的电阻率会像绝缘子的电阻率升高一样,低于其显示出最小值的特征温度。我们表明,可以通过使用电子相偏析成具有低和高电子密度的两个主要成分相的计算来解释这种总体行为。总电阻是通过各种随机选择局部电阻率的过程并使用通用的统计随机电阻器网络方法从各种贡献中得出的。

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