Metallic phase between the Fermi glass and the Wigner crystal in two dimensions

Details Metallic phase between the Fermi glass and the Wigner crystal in two dimensions Metallic phase between the Fermi glass and the Wigner crystal in two dimensions

1999-07-21

arxiv.org/abs/cond-mat/9907318v1

Ann. Phys. (Leipzig) 8, 691 (1999)

Physics

Condensed Matter

6 pages, 2 figures, submitted to the Proceedings of `Localization 1999'

Scientific paper

10.1002/(SICI)1521-3889(199911)8

For intermediate Coulomb energy to Fermi energy ratios $r_s$, spinless fermions in a two-dimensional random potential form a new quantum phase, different from the Fermi glass (weakly interacting Anderson localized states) and the Wigner crystal (regular array of charges pinned by the disorder). The intermediate phase is characterized by an ordered flow of persistent currents with a typical value decreasing with excitation energy. Extending finite size scaling analysis to the many body ground state, we find that electron-electron interactions can drive the Fermi glass towards an intermediate metallic phase (Coulomb metal).

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