Electronic Kinetic Energy in the Polaron Ground State and the Location of the Self-Trapping Transition

Details Electronic Kinetic Energy in the Polaron Ground State and the Location of the Self-Trapping Transition Electronic Kinetic Energy in the Polaron Ground State and the Location of the Self-Trapping Transition

1998-06-02

arxiv.org/abs/cond-mat/9806032v1

Physics

Condensed Matter

Scientific paper

In this paper we discuss the electronic kinetic energy in the ground state of the Holstein Hamiltonian in one space dimension using the Global-Local variational method together with perturbation theory at weak and strong coupling. The electronic kinetic energy is detailed over a broad region of the polaron parameter space, and is analyzed to accurately determine the location of the self-trapping transition. The self-trapping line so determined separates the small polaron regime from the large polaron regime, constituting a polaron phase diagram.

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