Abstract
Temperature dependences of the effective Hamiltonian and the renormalized mass of surface polaron, for which the electron is strongly coupled with the surface-optical (SO) phonons but weakly or intermediately coupled with the bulk longitudinal-optical (LO) phonons, are derived. Temperature dependences of the self-energy and the renormalized mass of the polaron for the polar crystal of potassium iodide are evaluated as a function of the depth from the crystal surface. Results of our calculation indicate that the self-trapping energy increases for strong electron-SO-phonon coupling but decreases for weak electron-LO-phonon coupling with temperature.
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