Unconventional metallic conduction in two-dimensional Hubbard-Wigner lattices
Strongly Correlated Electrons
2009-10-23 v2
Abstract
The interplay between long-range and local Coulomb repulsion in strongly interacting electron systems is explored through a two-dimensional Hubbard-Wigner model. An unconventional metallic state is found in which collective low-energy excitations characteristic of the Wigner crystal induce a flow of electrical current despite the absence of one-electron spectral weight at the Fermi surface. Photoemission experiments on certain quarter-filled layered molecular crystals should observe a gap in the excitation spectrum whereas optical spectroscopy should find a finite Drude weight indicating metallic behavior.
Keywords
Cite
@article{arxiv.0905.0707,
title = {Unconventional metallic conduction in two-dimensional Hubbard-Wigner lattices},
author = {S. Fratini and J. Merino},
journal= {arXiv preprint arXiv:0905.0707},
year = {2009}
}
Comments
10 pages, accepted for publication in PRB