title: Mobility of Holstein polaron at finite temperature: an unbiased approach.
abstract: We present the first unbiased results for the mobility μ of a one-dimensional Holstein polaron obtained by numerical analytic continuation combined with diagrammatic and worldline Monte Carlo methods in the thermodynamic limit. We have identified for the first time several distinct regimes in the λ-T plane including a band conduction region, incoherent metallic region, an activated hopping region, and a high-temperature saturation region. We observe that although mobilities and mean free paths at different values of λ differ by many orders of magnitude at small temperatures, their values at T larger than the bandwidth become very close to each other.
authors.affiliation: RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|NRC "Kurchatov Institute", 123182 Moscow, Russia.
authors.forename: A S
authors.initials: AS
authors.lastname: Mishchenko
authors.affiliation: RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Nagaosa
authors.affiliation: SPIN-CNR and Dipartimento di Fisica, Università di Napoli Federico II, I-80126 Napoli, Italy.
authors.forename: G
authors.initials: G
authors.lastname: De Filippis
authors.affiliation: SPIN-CNR and Dipartimento di Fisica, Università di Napoli Federico II, I-80126 Napoli, Italy.|INFN, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, Italy.
authors.forename: A
authors.initials: A
authors.lastname: de Candia
authors.affiliation: SPIN-CNR and Dipartimento di Fisica, Università di Napoli Federico II, I-80126 Napoli, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Cataudella