The vibron dressing in alpha-helicoidal macromolecular chains
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We present a study of the physical properties of the vibrational excitation in alpha-helicoidal macromolecular chains, caused by the interaction with acoustical and optical phonon modes. The influence of the temperature and the basic system parameters on the vibron dressing have been analyzed by employing the simple mean-field approach based on the variational extension of the Lang-Firsov unitary transformation. The applied approach predicts a region in system parameter space where one has an abrupt transition from a partially dressed (light and mobile) to a fully dressed (immobile) vibron state. We found that the boundary of this region depends on system temperature and the type of bond among structural elements in the macromolecular chain.
Keywords:vibron / small-polaron / alpha-helix / partial dressing
Source:Chinese Physics B, 2013, 22, 6
- Functional, Functionalized and Advanced Nanomaterials (RS-45005)
- Photonics of micro and nano structured materials (RS-45010)
- JINR, Dubna, Russian Federation and Ministry of Education and Science of Republic of Serbia