Quantum self-consistent approach to the charge gap of the quasi-one-dimensional organic conductors
Journal
Solid State Communications
Journal Volume
129
Journal Issue
7
Pages
443-448
Date Issued
2004
Author(s)
Jiang, X.
Abstract
We apply an extended quantum self-consistent method, in which quantum fluctuations are taken into account, to the bosonization Hamiltonian to investigate analytically the charge gap in the quasi-one-dimensional (1D) organic conductors at quarter-filling described by the 1D Hubbard model with dimerization and alternate potential on site. It is shown that either dimerization or alternate potential gives rise to the enhancement of the charge gap. Our results are compared with those of the numerical and the other analytical theories. Our results are also consistent with the experimental data of the actual organic materials when the effect of nearest-neighbor Coulomb interaction is taken into account. © 2003 Elsevier Ltd. All rights reserved.
Subjects
A. Organic crystals; A. Superconductors; D. Electronic state; D. Electronic transport
Other Subjects
Charge transfer; Dimerization; Electron energy levels; Electron transport properties; Hamiltonians; Organic conductors; Perturbation techniques; Vectors; Charge gap; Coulomb interaction; Quantum self-consistent method; Quantum theory
Type
journal article