| Issue |
Europhys. Lett.
Volume 49, Number 4, February II 2000
|
|
|---|---|---|
| Page(s) | 466 - 472 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00172-5 | |
| Published online | 01 September 2002 | |
Delocalized Coulomb phase in two dimensions
CEA, Service de Physique de l'Etat Condensé,
Centre d'Etudes de Saclay F-91191 Gif-sur-Yvette cedex, France
Received:
30
June
1999
Accepted:
5
December
1999
Extending the finite-size scaling theory to the many-body ground state,
one finds that Coulomb repulsion can drive a system of spinless
fermions in a random potential from the Anderson insulator (Fermi
glass of localized states) towards a new extended phase
in dimension d=2. The transition occurs at a Coulomb energy to Fermi
energy ratio 
, where a change in the nature of the
persistent currents has been previously observed. Relevance to the
recently observed 2d metallic phase is suggested.
PACS: 71.30.+h – Metal-insulator transitions and other electronic transitions / 72.15.Rn – Localization effects (Anderson or weak localization) / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 2000
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