Quantum melting on a lattice and a delocalization transition
Condensed Matter
2008-02-03 v2
Abstract
We consider 2d gas of spinless fermions with the Coulomb interaction on a lattice at T=0 and at different values of the hopping amplitude J. At small J electrons form a periodic structure. At filling factor \nu=1/6 this structure melts at J as low as 0.02--0.03 in units of the nearest-neighbor Coulomb energy. We argue that this transition is connected to the dielectric-metal and dielectric-superconductor transitions. To demonstrate this point we perform computer modeling of the systems 6x6 with 6 and 7 electrons and 6x12 with 12 electrons. By sweeping J we compute simultaneously persistent current and structural characteristics of the electron distribution.
Cite
@article{arxiv.cond-mat/9512150,
title = {Quantum melting on a lattice and a delocalization transition},
author = {E. V. Tsiper and F. G. Pikus and A. L. Efros},
journal= {arXiv preprint arXiv:cond-mat/9512150},
year = {2008}
}
Comments
10 tex preprint pages + 4 ps figures, uuencoded