1.
Phys Rev Lett
; 84(17): 3930-3, 2000 Apr 24.
Artigo
em Inglês
| MEDLINE
| ID: mdl-11019242
RESUMO
A diagrammatic method is applied to study the effects of commensurability in two-dimensional disordered crystalline metals by using the particle-hole symmetry with respect to the nesting vector P0 = +/-pi / a,pi / a for a half-filled electronic band. The density of electronic states (DoS) is shown to have nontrivial quantum corrections due to both nesting and elastic impurity scattering processes, and as a result the Van Hove singularity is preserved in the center of the band. However, the energy dependence of the DoS is significantly changed. A small offset from the middle of the band gives rise to the disappearance of quantum corrections to the DoS.
2.
Phys Rev B Condens Matter
; 54(9): 6624-6631, 1996 Sep 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-9986681