Electronic Resource
Springer
Journal of low temperature physics
105 (1996), S. 651-656
ISSN:
1573-7357
Keywords:
71.10.Fd
;
71.55.Jv
;
74.80.Bj
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The electron pairing in randomly disordered lattices is studied by using an attractive Hubbard model, and by mapping the many-body problem onto a tight-binding one in a higher dimensional space, where a diagonal disorder is considered within the coherent-potential approximation. The results show an enhancement of the pair-binding energy as the self-energy difference increases in a binary alloy AxB1−x. This fact suggests that the pairing process is highly sensitive to the one-particle localization condition. A ground-state phase diagram for on-site interaction disorder shows regions where pairing is avoid for ordered diatomic systems but not for disordered case.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00768458
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