Trapping of lattice polarons by impurities

Abstract

We consider the effects of single impurities on polarons in three-dimensions (3D) using a continuous time quantum Monte-Carlo algorithm. An exact treatment of the phonon degrees of freedom leads to a very efficient algorithm and we are able to compute the polaron dynamics on an infinite lattice using an auxiliary weighting scheme. The magnitude of the impurity potential, the electron-phonon coupling and the phonon frequency are varied. We determine the magnitude of the impurity potential required for polaron trapping. For small electron-phonon coupling the number of phonons increases dramatically on trapping. The polaron binding diagram is computed, showing that intermediate-coupling low-phonon-frequency polarons are localized by exceptionally small impurities.

arXiv comment4 pages, 4 figures

References in corpus (6)

• Continuous-Time Quantum Monte Carlo Algorithm for the Lattice Polaron
• Superlight small bipolarons in the presence of strong Coulomb repulsion
• Statistical dynamical mean-field description of strongly correlated disordered electron-phonon systems
• Anderson localization of polaron states
• Superlight small bipolarons
• Dynamics of a single electron in the disordered Holstein model

Cited by in corpus (9)

• Trapping of three-dimensional Holstein polarons by various impurities
• Localization of Large Polarons in the Disordered Holstein Model
• Localization-delocalization transition of a polaron near an impurity
• Holstein polaron in the presence of disorder
• Pekar's Ansatz and the Strong Coupling Problem in Polaron Theory
• Mobile small bipolarons on a three-dimensional cubic lattice
• Interplay between electron-phonon couplings and disorder strength on the transport properties of organic semiconductors
• Strong interplay between electron-phonon interaction and disorder in low doped systems
• Exact solution of electronic transport in semiconductors dominated by scattering on polaronic impurities