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Ground state of a partially melted Wigner molecule

Name: Ground state of a partially melted Wigner molecule
Keywords: Condensed Matter - Strongly Correlated Electrons, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Jun 2002Embargo end date: 01 Jan 2002Publisher:IOP PublishingJournal:Europhysics Letters (EPL), volume 58, pages 744-750 (issn: 0295-5075, eissn: 1286-4854,

Authors: Zoltan Adam Nemeth; Jean-Louis Pichard;

doi: 10.1209/epl/i2002-00412-2 , 10.48550/arxiv.cond-mat/0203477

arXiv: http://arxiv.org/abs/cond-mat/0203477

Ground state of a partially melted Wigner molecule

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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.

to appear in Europhysics Letters

Related Organizations

Eötvös Loránd University
Hungary

Keywords

Condensed Matter - Strongly Correlated Electrons, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences

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