Τίτλος:
Correlated small polaron hopping transport in 1D disordered systems at
high temperatures: a possible charge transport mechanism in DNA
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Based on the generalized molecular crystal model (GMCM) and theoretical
percolation arguments we investigate small polaron hopping transport in
1D disordered systems at high temperatures. Correlation (cr) effects are
taken into account. An analytical expression for the temperature
dependence of the electrical conductivity, ln sigma(h,cr) similar to
T-1/2, is obtained. This result reproduces satisfactorily the
experimental data reported for lambda-DNA and for poly(dA)-poly(dT) DNA,
considering DNA as a one-dimensional disordered molecular wire in which
small polarons are the charge carriers. ln sigma(h,cr) versus T-1/2
plots permit the evaluation of the maximum hopping distance. The results
indicate that correlation effects are probably responsible for large
hopping distances in DNA samples.
Συγγραφείς:
Triberis, G. P.
Dimakogianni, M.
Περιοδικό:
JOURNAL OF PHYSICS : CONDENSED MATTER
Εκδότης:
IOP Publishing Ltd
DOI:
10.1088/0953-8984/21/3/035114
