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Metallic phase between the Fermi glass and the Wigner crystal in two dimensions
Author(s) -
Waintal X.,
Benenti G.,
Pichard J.L.
Publication year - 1999
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/(sici)1521-3889(199911)8:7/9<691::aid-andp691>3.0.co;2-j
Subject(s) - wigner crystal , condensed matter physics , physics , fermi energy , coulomb , fermi gas , phase (matter) , fermi gamma ray space telescope , ground state , fermion , electron , crystal (programming language) , quantum mechanics , computer science , programming language
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).