Vibron transport in macromolecular chains

We study the hopping mechanism of the vibron excitation transport in the simple 1D model of biological macromolecular chains. We supposed that the vibron interaction with thermal oscillations of the macromolecular structural elements will result in vibron self-trapping, and the formation of the part...

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Bibliographic Details
Main Authors: Čevizović Dalibor, Ivič Zoran, Galovič Slobodanka, Chizhov Alexei, Reshetnyak Alexander
Format: Conference Proceeding
Language:English
Subjects:
Adiabatic flow
Coupling
Critical point
Dependence
Diffusivity
Macromolecules
Molecular chains
Nanorods
One dimensional models
Polymer films
Polymers
Structural members
Thermal oscillations
Transport
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Summary:We study the hopping mechanism of the vibron excitation transport in the simple 1D model of biological macromolecular chains. We supposed that the vibron interaction with thermal oscillations of the macromolecular structural elements will result in vibron self-trapping, and the formation of the partial dressed vibron state. With use of the modified Holstein polaron model, we calculate vibron diffusivity in dependence of the basic system parameters and temperature. We obtain that the vibron diffusivity smoothly decreases in non adiabatic limit when the strength of the vibron-phonon coupling grows. However this dependence becomes by discontinuous one in case of growth of the adiabaticity of the system. The value of the critical point depends of the system temperature, and at room temperatures it belongs to the low or intermediate coupling regime. We discuss an application of these results to study of vibron transport to 3D bundles of such macromolecules chains considering it as polymer nanorods and to 2D polymer films organized from such macromolecules.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4898887