掺杂CMR磁性材料中的晶格与超交换效应
强关联电子
2007-05-23 v1
摘要
We report on the influence of the lattice degrees of freedom on charge, orbital and spin correlations in colossal magnetoresistance (CMR) manganites. For the weakly doped compounds we demonstrate that the electron-phonon coupling promotes the trapping of charge carriers, the disappearance of the orbital polaron pattern and the breakdown of ferromagnetism at the CMR transition. The role of different superexchange interactions is explored.
引用
@article{arxiv.cond-mat/0304491,
title = {Lattice and superexchange effects in doped CMR manganites},
author = {Alexander Weisse and Holger Fehske},
journal= {arXiv preprint arXiv:cond-mat/0304491},
year = {2007}
}
备注
2 pages, 1 figure, submitted to ICM 2003