title: Sub-diffusive electronic transport in a DNA single-strand chain with electron-phonon coupling.
abstract: We investigate the electronic wavepacket dynamics in a finite segment of a DNA single-strand chain considering the electron-phonon coupling. Our theoretical approach makes use of an effective tight-binding Hamiltonian to describe the electron dynamics, together with a classical harmonic Hamiltonian to treat the intrinsic DNA vibrations. An effective time-dependent Schrödinger equation is then settled up and solved numerically for an initially localized wave-packet using the standard Dormand-Prince eighth-order Runge-Kutta method. Our numerical results indicate the presence of a sub-diffusive electronic wavepacket spread mediated by the electron-phonon interaction.
authors.affiliation: Instituto de Física, Universidade Federal de Alagoas, 57072-900 Maceió-AL, Brazil.
authors.forename: M O
authors.initials: MO
authors.lastname: Sales
authors.forename: M L
authors.initials: ML
authors.lastname: Lyra
authors.forename: F A B F
authors.initials: FA
authors.lastname: de Moura
authors.forename: U L
authors.initials: UL
authors.lastname: Fulco
authors.forename: E L
authors.initials: EL
authors.lastname: Albuquerque
mesh_terms: D004277:DNA, Single-Stranded / Q000737:chemistry*; D004058:Diffusion; D004579:Electron Transport; D060739:Phonons
chemical_list: D004277:DNA, Single-Stranded