金属在大温度下的电阻率饱和
材料科学
2009-11-07 v2 强关联电子
摘要
We present a microscopic model for systems showing resistivity saturation. An essentially exact quantum Monte-Carlo calculation demonstrates that the model describes saturation. We give a simple explanation for saturation, using charge conservation and considering the limit where thermally excited phonons have destroyed the periodicity. Crucial model features are phonons coupling to the hopping matrix elements and a unit cell with several atoms. We demonstrate the difference to a model of alkali-doped C60 with coupling to the level positions, for which there is no saturation.
引用
@article{arxiv.cond-mat/0106397,
title = {Saturation of electrical resistivity in metals at large temperatures},
author = {M. Calandra and O. Gunnarsson},
journal= {arXiv preprint arXiv:cond-mat/0106397},
year = {2009}
}
备注
4 page, RevTeX, 3 eps figures, additional material available at http://www.mpi-stuttgart.mpg.de/andersen/fullerene/