THE COULOMB GAP AND THE TRANSITION TO MOTT HOPPING

Citation
Fw. Vankeuls et al., THE COULOMB GAP AND THE TRANSITION TO MOTT HOPPING, Surface science, 362(1-3), 1996, pp. 945-948
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
0039-6028
Volume
362
Issue
1-3
Year of publication
1996
Pages
945 - 948
Database
ISI
SICI code
0039-6028(1996)362:1-3<945:TCGATT>2.0.ZU;2-S
Abstract
Resistivity data are presented which confirm a Coulomb gap in the sing le particle density of states in two dimensional variable range hoppin g. For large hopping lengths the Coulomb interaction is screened by a metallic gate. A universal crossover to Mott hopping is observed at lo w temperatures. Excellent agreement with theory is achieved with a sin gle parameter fit.