https://doi.org/10.1007/s100510170046
Delocalization in disordered chains with random symmetrical impurities
1
National Laboratory of Solid State Microstructures and Department of
Physics, Nanjing University, Nanjing 210093, PR China
2
Communication Researching Section, Communication Engineering Institute
of Nanjing, PLA University of Science and Technology, Nanjing 210016, PR China
Corresponding author: a xqhuang@netra.nju.edu.cn
Received:
15
January
2001
Revised:
30
April
2001
Published online: 15 October 2001
We study in this paper, with the context of a tight-binding on-side model,
the electronic properties of one-dimensional random lattices with correlated
impurities. We show that, when symmetrical impurities 
are inserted in a host chain of site energy
and a constant hopping interaction V, diffusion will occur
even when 
is random. We provide analytic expressions for
the transmittance and confirm the theoretical results by a great deal of
numerical calculations. When 
we find that the
mean-square displacement (MSD) follows the law 
with 
for 
and 
for 
random, respectively.
PACS: 71.55.Jv – Disordered structure; amorphous and glassy solids / 72.15.Rn – Localization effects (Anderson or weak localization) / 71.23.-k – Electronic structure of disordered solids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
