Dynamical Self-Trapping of Vibrons in Quasi-One-Dimensional Lattice

概要

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Dynamical self-trapping of vibrons in quasi-one-dimensional (ld) lattice spacecaused by their nonlinear interactions with ld acoustic lattice phonons is studied withparticular attention paid to the lattice discreteness effect. l"or coupled model fieldequations satisfied by vibrons and phonons, an elimination of phonon field variablescan be achieved rigorously, leading to nonlinear-Klein-(iordon-type generalizedLangevin equations with memory kernels written in terms of the Bessel functions.Within the framework of a rotating-wave approximation and neglecting frictionterms with memory effects and random-force terms, an exact Green's functionmethod is developed to describe the dynamical self-trapping of vibrons as intrinsic,movable localized modes.[vibron-phonon interactions, dynamical self-trapping, vibron polarons, intrinsic ll localized modes, solitons, generalized Langevin equationl
社団法人日本物理学会の論文
1989-05-15