1994/07/01 by C. Vermeulen, C Vermeulen, Vermeulen, C. +5
Materials Science · Physics and Astronomy · #Condensed Matter (cond-mat) #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Ga2O3 and related materials #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9407004
Latex
arxiv created 1994/07/01 · openalex publication_date 1994/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The effects of the nearest neighbour Coulomb repulsion, V, are considered in the one dimensional copper-oxide chain using the modified Lanczos method. Above a critical value of V we find that charge transfer excitons are the lowest lying energy exitations in the insulating phase. Close to the metal-insulator transition and V=0 there is good `particle-hole' symmetry, showing that the mapping from a two band model to a one band model is appropriate. The effect of the nearest neighbour repulsion is to create states in the gap and to pin the Fermi level upon hole doping.