Effect of different site energies on polaronic properties

Abstract

Using the perturbation method based on a variational phonon basis obtained by the modified Lang-Firsov (MLF) transformation, the two-site single polaron Holstein model is studied in presence of a difference in bare site energies (${\epsilon }_d$=${\epsilon }_2$-${\epsilon }_1$). The polaronic ground-state wave function is calculated up to the fifth order of perturbation. The effect of ${\epsilon }_d$ (acts as a site-energy disorder) on the polaron crossover, polaronic kinetic energy, oscillator wavefuncion and polaron localization are studied. Considering a double-exchange Holstein model with finite ${\epsilon }_d$, role of disorder on the properties of the double-exchange system is also discussed.

9 pages, 7 figures, submitted to PRB

References in corpus (4)

• Ferromagnetism and electron-phonon coupling in the manganites
• Statistical dynamical mean-field description of strongly correlated disordered electron-phonon systems
• Anderson localization of polaron states
• Dynamics of a single electron in the disordered Holstein model

Cited by in corpus (2)

• Classical simulation of the Hubbard-Holstein dynamics with optical waveguide lattices
• Thermodynamic properties of Holstein polarons and the effects of disorder