Effect of atomic fluctuation on the localized modes in one-dimensional system | Zendy

Dacheng Zhang | Zendy; Luxia Wang | Zendy; Desheng Liu | Zendy; Shenghao Han | Zendy; Shijie Xie | Zendy

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Effect of atomic fluctuation on the localized modes in one-dimensional system

Author(s) -

Dacheng Zhang,

Luxia Wang,

Desheng Liu,

Shenghao Han,

Shijie Xie

Publication year - 2003

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.52.3191

Subject(s) - polaron , physics , soliton , lattice (music) , condensed matter physics , work (physics) , mode (computer interface) , frame work , quantum mechanics , goldstone , quantum electrodynamics , nonlinear system , theoretical physics , electron , computer science , acoustics , operating system , geodesy , geography

In the frame work of the tight-binding approximation, the effect of defects and disorder on the vibrational modes in one-dimensional systems was studied through a random distribution model. It was found that the Goldstone mode of a so liton or polaron is pinned and its frequency is shifted up to a finite value. Th e weak mode g4 of a soliton is enhanced. The staggered modes keep the ir localization even if there is a large lattice fluctuation. Some new modes appear when the perfect soliton or polaron configuration is disturbed.

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