Density-functionals not based on the electron gas: Local-density approximation for a Luttinger liquid
强关联电子
2009-11-07 v4 材料科学
摘要
By shifting the reference system for the local-density approximation (LDA) from the electron gas to other model systems one obtains a new class of density functionals, which by design account for the correlations present in the chosen reference system. This strategy is illustrated by constructing an explicit LDA for the one-dimensional Hubbard model. While the traditional {\it ab initio} LDA is based on a Fermi liquid (the electron gas), this one is based on a Luttinger liquid. First applications to inhomogeneous Hubbard models, including one containing a localized impurity, are reported.
引用
@article{arxiv.cond-mat/0112428,
title = {Density-functionals not based on the electron gas: Local-density approximation for a Luttinger liquid},
author = {N. A. Lima and M. F. Silva and L. N. Oliveira and K. Capelle},
journal= {arXiv preprint arXiv:cond-mat/0112428},
year = {2009}
}
备注
4 pages, 4 figures (final version, contains additional applications and discussion; accepted by Phys. Rev. Lett.)