Extended electronic states in disordered 1-d lattices: an example
Condensed Matter
2009-10-22 v1
Abstract
We discuss a very simple model of a 1-d disordered lattice, in which {\em all} the electronic eigenstates are extended. The nature of these states is examined from several viewpoints, and it is found that the eigenfunctions are not Bloch functions although they extend throughout the chain. Some typical wavefunctions are plotted. This problem originated in our earlier study of extended states in the quasiperiodic copper-mean lattice [ Sil, Karmakar, Moitra and Chakrabarti, Phys. Rev. B (1993) ]. In the present investigation extended states are found to arise from a different kind of correlation than that of the well-known dimer-type.
Keywords
Cite
@article{arxiv.cond-mat/9312011,
title = {Extended electronic states in disordered 1-d lattices: an example},
author = {S. Sil and S. N. Karmakar and R. K. Moitra},
journal= {arXiv preprint arXiv:cond-mat/9312011},
year = {2009}
}
Comments
9 pages, 1 figure available on request, LaTex version 2.09, SINP-SSMP93-02