Effects of nanoscale spatial inhomogeneity in strongly correlated systems
Strongly Correlated Electrons
2016-08-31 v1 Materials Science
Abstract
We calculate ground-state energies and density distributions of Hubbard superlattices characterized by periodic modulations of the on-site interaction and the on-site potential. Both density-matrix renormalization group and density-functional methods are employed and compared. We find that small variations in the on-site potential can simulate, cancel, or even overcompensate effects due to much larger variations in the on-site interaction . Our findings highlight the importance of nanoscale spatial inhomogeneity in strongly correlated systems, and call for reexamination of model calculations assuming spatial homogeneity.
Keywords
Cite
@article{arxiv.cond-mat/0502355,
title = {Effects of nanoscale spatial inhomogeneity in strongly correlated systems},
author = {M. F. Silva and N. A. Lima and A. L. Malvezzi and K. Capelle},
journal= {arXiv preprint arXiv:cond-mat/0502355},
year = {2016}
}
Comments
5 pages, 1 table, 4 figures, to appear in PRB