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arXiv 0811.4442cond-mat.str-el
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各向异性层状金属层间磁电阻的温度特性

Temperature Dependence of Interlayer Magnetoresistance in Anisotropic Layered Metals

Braden A. W. Brinkman, Malcolm P. Kennett

摘要:

在层状金属的层间输运研究中,一般采用零温电导率表达式来分析角相关磁电阻振荡(AMRO)。然而,最近的高温AMRO实验已经进行了一个制度,其中包括有限的温度效应可能需要的电阻率的定量描述。我们计算层间导电性的各向异性费米表面特性允许有限的温度效应的层状金属。我们发现,电阻最大值的修改更强烈的热效应比电阻最小值。我们还使用我们的表达式来计算层间电阻率适合最近AMRO实验中的过掺杂的铜酸盐,导致的结论是,有一个各向异性的,线性的温度贡献的散射率,并发现这一结论是强大的。

英文摘要:

Studies of interlayer transport in layered metals have generally made use of zero temperature conductivity expressions to analyze angle-dependent magnetoresistance oscillations (AMRO). However, recent high temperature AMRO experiments have been performed in a regime where the inclusion of finite temperature effects may be required for a quantitative description of the resistivity. We calculate the interlayer conductivity in a layered metal with anisotropic Fermi surface properties allowing for finite temperature effects. We find that resistance maxima are modified by thermal effects much more strongly than resistance minima. We also use our expressions to calculate the interlayer resistivity appropriate to recent AMRO experiments in an overdoped cuprate which led to the conclusion that there is an anisotropic, linear in temperature contribution to the scattering rate and find that this conclusion is robust.

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