Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11613

Title: Effect off electron-phonon interaction range on lattice polaron dynamics: a continuous-time quantum Monte Carlo study
Authors: Spencer, P.E.
Samson, J.H.
Kornilovitch, P.E.
Alexandrov, A.S.
Issue Date: 2005
Publisher: © Americal Physical Society
Citation: SPENCER, P.E. ... et al, 2005. Effect off electron-phonon interaction range on lattice polaron dynamics: a continuous-time quantum Monte Carlo study. Physical Review B, 71 (18), 184310 (19pp.).
Abstract: We present the numerically exact ground state energy, effective mass, and isotope exponents of a one-dimensional lattice polaron, valid for any range of electron-phonon interaction, applying a continuous-time Quantum Monte Carlo (QMC) technique in a wide range of coupling strength and adiabatic ratio. The QMC method is free from any systematic finite-size and finite-time-step errors. We compare our numerically exact results with analytical weak-coupling theory and with the strongcoupling 1/ expansion. We show that the exact results agree well with the canonical Fr¨ohlich and Holstein-Lang-Firsov theories in the weak and strong coupling limits, respectively, for any range of interaction. We find a strong dependence of the polaron dynamics on the range of interaction. An increased range of interaction has a similar effect to an increased (less adiabatic) phonon frequency: specifically, a reduction in the effective mass.
Version: Published
DOI: 10.1103/PhysRevB.71.184310
URI: https://dspace.lboro.ac.uk/2134/11613
Publisher Link: http://dx.doi.org/10.1103/PhysRevB.71.184310
http://link.aps.org/doi/10.1103/PhysRevB.71.184310
ISSN: 1098-0121
Appears in Collections:Published Articles (Physics)

Files associated with this item:

File Description SizeFormat
polaronQMC.pdf345.64 kBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.