title: Double path integral method for obtaining the mobility of the one-dimensional charge transport in molecular chain.
abstract: We report on a theoretical investigation concerning the polaronic effect on the transport properties of a charge carrier in a one-dimensional molecular chain. Our technique is based on the Feynman's path integral approach. Analytical expressions for the frequency-dependent mobility and effective mass of the carrier are obtained as functions of electron-phonon coupling. The result exhibits the crossover from a nearly free particle to a heavily trapped particle. We find that the mobility depends on temperature and decreases exponentially with increasing temperature at low temperature. It exhibits large polaronic-like behaviour in the case of weak electron-phonon coupling. These results agree with the phase transition (A.S. Mishchenko et al., Phys. Rev. Lett. 114, 146401 (2015)) of transport phenomena related to polaron motion in the molecular chain.
authors.affiliation: Theoretical and Computational Physics (TCP) Group, Department of Physics, Faculty of Science, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. sikarin.yoo@kmutt.ac.th.|Theoretical and Computational Science Centre (TaCS), Faculty of Science, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. sikarin.yoo@kmutt.ac.th.|Ratchaburi Campus, King Mongkut's University of Technology Thonburi, 70510, Ratchaburi, Thailand. sikarin.yoo@kmutt.ac.th.
authors.forename: Sikarin
authors.initials: S
authors.lastname: Yoo-Kong
authors.affiliation: Theoretical and Computational Physics (TCP) Group, Department of Physics, Faculty of Science, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. watchara.lie@kmutt.ac.th.|Theoretical and Computational Science Centre (TaCS), Faculty of Science, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. watchara.lie@kmutt.ac.th.|ThEP Center, Commission of Higher Education, 328 Si Ayuthaya Rd., 10400, Bangkok, Thailand. watchara.lie@kmutt.ac.th.
authors.forename: Watchara
authors.initials: W
authors.lastname: Liewrian
mesh_terms: D004247:DNA / Q000737:chemistry; D004579:Electron Transport; D008958:Models, Molecular; D009690:Nucleic Acid Conformation; D013696:Temperature
chemical_list: D004247:DNA
keywords: Living systems: Biological Matter