Numerical study of the $E\otimes e$ Jahn-Teller polaron and bipolaron

Details Numerical study of the $E\otimes e$ Jahn-Teller polaron and bipolaron Numerical study of the $E\otimes e$ Jahn-Teller polaron and bipolaron

2002-11-06

arxiv.org/abs/cond-mat/0211099v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages including 11 figures. To appear in PRB

Scientific paper

10.1103/PhysRevB.67.014301

The properties of the polaron and bipolaron are explored in the 1D Jahn-Teller model with dynamical quantum phonons. The ground-state properties of the polaron and bipolaron are computed using a recently developed variational method. Dynamical properties of the ground state of a polaron are investigated by calculating the optical conductivity $\sigma(\omega)$. Our numerical results suggest that the Jahn-Teller and Holstein polarons are similar. However, in the strong-coupling regime qualitative differences in $\sigma(\omega)$ between the two models are found and discussed. The influence of the electron-phonon coupling and the electrostatic repulsion on the bipolaron binding energy, bipolaron masses, and correlation functions is investigated.

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