小角跨带散射是MnSi中$T^{3/2}$电阻率起源的原因
材料科学
2007-09-18 v4
摘要
给出一种对MnSi电阻率异常温度依赖性的可能解释——该现象在高压 paramagnetic 态下观察到。MnSi的异常费米面包括大型开放板，它们沿立方布里渊面的面相交。在这些交点处，长程波长的跨带磁性自旋涨落可将电子从一个板散射到另一个板。由于跨带散射引起的电流松弛速率在顶点修正下未被降低，这与来自跨带铁磁涨落的散射速率不同。因此，电流松弛的过程类似于在准反铁金属中发生的过程——后者已为人所知地在低温行为。认为这种非费米液行为对于具有铁磁涨落且费米面相交金属，可能在更宽的温度范围内持续存在。
引用
@article{arxiv.cond-mat/0611235,
title = {Model-independent derivation of macroscopic Maxwell equations from microscopic basis: Beyond the "\epsilon and \mu" description},
author = {Kikuo Cho},
journal= {arXiv preprint arXiv:cond-mat/0611235},
year = {2007}
}
备注
22 pages, 2 figures. Two appendices are added for the fundamentals of Maxwell eqs. and for the derivation of microscopic constitutive equation. Sec.1 is rewritten to stress the motivation of this work. Three new ref's are added, and one of them is discussed in detail in Sec.3.2