Ground state of a partially melted Wigner molecule

Z. Németh, J. L. Pichard

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 rs is large, a rigid Wigner molecule is formed. As rs 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.

Original languageEnglish
Pages (from-to)744-750
Number of pages7
JournalEPL
Volume58
Issue number5
DOIs
Publication statusPublished - 2002

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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