Ground state of a partially melted Wigner molecule
Strongly Correlated Electrons
2009-11-07 v1
Abstract
We consider three spinless fermions free to move on 2d square lattice with periodic boundary conditions and interacting via a U/r Coulomb repulsion. When the Coulomb energy to kinetic energy ratio r_s is large, a rigid Wigner molecule is formed. As r_s decreases, we show that melting proceeds via an intermediate regime where a floppy two particle molecule coexists with a partially delocalized particle. A simple ansatz is given to describe the ground state of this mesoscopic solid-liquid regime.
Cite
@article{arxiv.cond-mat/0203477,
title = {Ground state of a partially melted Wigner molecule},
author = {Zoltan Adam Nemeth and Jean-Louis Pichard},
journal= {arXiv preprint arXiv:cond-mat/0203477},
year = {2009}
}
Comments
to appear in Europhysics Letters