RT Journal Article
T1 Effects of the environment on the electric conductivity of double-stranded DNA molecules
A1 Malyshev, Andrey
A1 Díaz García, Elena
A1 Domínguez-Adame Acosta, Francisco
AB We present a theoretical analysis of the effects of the environment on charge transport in double-stranded synthetic poly(G)-poly(C) DNA molecules attached to two ideal leads. Coupling of the DNA to the environment results in two effects: (i) localization of carrier functions due to static disorder and (ii) phonon-induced scattering of the carriers between the localized states, resulting in hopping conductivity. A nonlinear Pauli master equation for populations of localized states is used to describe the hopping transport and calculate the electric current as a function of the applied bias. We demonstrate that, although the electronic gap in the density of states shrinks as the disorder increases, the voltage gap in the I-V characteristics becomes wider. A simple physical explanation of this effect is provided.
PB IOP Publishing Ltd.
SN 0953-8984
YR 2009
FD 2009-08-19
LK https://hdl.handle.net/20.500.14352/45066
UL https://hdl.handle.net/20.500.14352/45066
LA eng
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NO © Copyright IOP Publishing.This work was supported by Ramón y Cajal Program, MEC (Project MOSAICO), and BSCH-UCM (Project PR34/07-15916).
NO Ministerio de Educación y Ciencia (MEC), España
NO Programa Ramón y Cajal (MEC)
NO Banco Santander Central Hispano (BSCH)
NO Universidad Complutense de Madrid (UCM)
DS Docta Complutense
RD 16 may 2024