Electron-Phonon Correlation Effects in Molecular Transistors
强关联电子
2007-05-23 v2 介观与纳米尺度物理
摘要
The interplay of electron-electron and electron-phonon interactions is studied analytically in the Kondo regime. A Holstein electron-phonon coupling is shown to produce a weakening of the gate voltage dependence of the Kondo temperature and may explain the observed anomalies in some of these devices. A molecular center-of-mass mode opens a new channel for charge and spin fluctuations and in the antiadabatic limit the latter are described by an asymmetric two-channel Kondo model. Below the Kondo temperature the system develops a dynamical Jahn-Teller distortion and a low energy peak emerges in the phonon spectral density that could be observed in Raman microscopy experiments.
引用
@article{arxiv.cond-mat/0605064,
title = {Electron-Phonon Correlation Effects in Molecular Transistors},
author = {C. A. Balseiro and P. S. Cornaglia and D. R. Grempel},
journal= {arXiv preprint arXiv:cond-mat/0605064},
year = {2007}
}
备注
6 pages, 4 figures