Effect of dispersive optical phonons on the behavior of a Holstein polaron

We use the approximation-free bold diagrammatic Monte Carlo technique to study the effects of a finite dispersion of the optical phonon mode on the properties of the Holstein polaron, especially its effective mass. For weak electron-phonon coupling the effect is very small, but it becomes significan...

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Veröffentlicht in:	Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-08, Vol.88 (6), Article 060301
Hauptverfasser:	Marchand, Dominic J. J., Berciu, Mona
Format:	Artikel
Sprache:	eng
Schlagworte:	Approximation Condensed matter Dispersions Joining Mathematical analysis Optical properties Phonons Polarons
Online-Zugang:	Volltext
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