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Phononless Hopping in the Coulomb Glass
Author(s) -
Talamantes J.,
Möbius A.
Publication year - 1998
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199801)205:1<45::aid-pssb45>3.0.co;2-8
Subject(s) - coulomb , delocalized electron , electron , condensed matter physics , physics , boundary (topology) , statistical physics , quantum mechanics , mathematics , mathematical analysis
We studied the effects of coherent hopping on localization in disordered systems of interacting localized electrons. Using a computational approach, we found that, within the parameters of our study, the inter‐site Coulomb interactions between electrons enhance delocalization. We suggest that this is because short low‐energy few‐electron coherent hops are more effective in delocalizing electrons in the presence of those interactions. These transitions are relatively rare in the non‐interacting case. As the system size is increased the effect is reduced, although it remains important. The reason seems to be that, for small systems, our approach magnifies coherent hopping due to our choice of boundary conditions.