Tunneling Rate for Superparamagnetic Particles by the Instanton Method
统计力学
2009-11-07 v1
摘要
We derive the tunneling rate for paramagnetic molecules in the context of a collective spin model. By means of path integral methods an analytical expression is derived. Given the very large spins in question (s ~ 3000 hbar), the observation of magnetization changes due to pure unitary tunnel effects is unlikely.
引用
@article{arxiv.cond-mat/0207744,
title = {Tunneling Rate for Superparamagnetic Particles by the Instanton Method},
author = {E. H. Martins Ferreira and M. C. Nemes},
journal= {arXiv preprint arXiv:cond-mat/0207744},
year = {2009}
}
备注
16 pages, 2 figures