Configuration space in electron glasses
摘要
We study numerically the configuration space at low energy of electron glasses. We consider systems with Coulomb interactions, short-range interactions and no interactions. First, we calculate the integrated density of configurations as a function of energy. At a given energy, this density is smaller for Coulomb glasses than for short-range systems, which in turn is smaller than for non-interacting systems. We analyze how the site occupancy varies with the number of configurations. Through this study we estimate the number of particles involved in a typical low-energy transition between configurations. This number increases with system size for long range interactions, while it is basically constant for a short-range interaction. Finally we calculate the density of metastable configurations, i.e. valleys, classified according to their degree of stability.
引用
@article{arxiv.cond-mat/9906014,
title = {Configuration space in electron glasses},
author = {A. Perez-Garrido and M. Ortuno and A. M. Somoza and A. Diaz-Sanchez},
journal= {arXiv preprint arXiv:cond-mat/9906014},
year = {2007}
}
备注
5 figures