Coulomb Gaps in One-Dimensional Spin-Polarized Electron Systems
Abstract
We investigate the density of states (DOS) near the Fermi energy of one-dimensional spin-polarized electron systems in the quantum regime where the localization length is comparable to or larger than the inter-particle distance. The Wigner lattice gap of such a system, in the presence of weak disorder, can occur precisely at the Fermi energy, coinciding with the Coulomb gap in position. The interplay between the two is investigated by treating the long-range Coulomb interaction and the random disorder potential in a self-consistent Hartree-Fock approximation. The DOS near the Fermi energy is found to be well described by a power law whose exponent decreases with increasing disorder strength.
Cite
@article{arxiv.cond-mat/9608055,
title = {Coulomb Gaps in One-Dimensional Spin-Polarized Electron Systems},
author = {Gun Sang Jeon and M. Y. Choi and S. -R. Eric Yang},
journal= {arXiv preprint arXiv:cond-mat/9608055},
year = {2009}
}
Comments
4 pages, revtex, 4 figures, to be published in Phys. Rev. B as a Rapid Communication