The vibron dressing in α-helicoidal macromolecular chains

doi:10.1088/1674-1056/22/6/060501

中国物理B ›› 2013, Vol. 22 ›› Issue (6): 60501-060501.doi: 10.1088/1674-1056/22/6/060501

The vibron dressing in α-helicoidal macromolecular chains

D. Čevizović^{a b}, S. Galović^{a b}, A. Reshetnyak^c, Z. Ivić^a

a University of Belgrade, Vinča Institute of Nuclear Sciences Laboratory for Theoretical and Condensed Matter Physics, P. O. Box 522, 11001 Belgrade, Serbia;
b Joint Institute for Nuclear Research Bogoliubov Laboratory for Theoretical Physics, Dubna, Russia;
c Laboratory of Non-Linear Media Physics, Institute of Strength Physics and Materials Science, Tomsk, 634021, Russia

收稿日期:2012-11-01 修回日期:2012-12-28 出版日期:2013-05-01 发布日期:2013-05-01
基金资助:
Project supported by the Science Fund of the Ministry of Education and Science of Republic of Serbia (Grant Nos. III-45005 and III-45010) and by the Project within the Cooperation Agreement between the JINR, Dubna, Russian Federation and Ministry of Education and Science of Republic of Serbia.

The vibron dressing in α-helicoidal macromolecular chains

D. Čevizović^{a b}, S. Galović^{a b}, A. Reshetnyak^c, Z. Ivić^a

a University of Belgrade, Vinča Institute of Nuclear Sciences Laboratory for Theoretical and Condensed Matter Physics, P. O. Box 522, 11001 Belgrade, Serbia;
b Joint Institute for Nuclear Research Bogoliubov Laboratory for Theoretical Physics, Dubna, Russia;
c Laboratory of Non-Linear Media Physics, Institute of Strength Physics and Materials Science, Tomsk, 634021, Russia

Received:2012-11-01 Revised:2012-12-28 Online:2013-05-01 Published:2013-05-01
Contact: D. Čevizović E-mail:cevizd@vinca.rs
Supported by:
Project supported by the Science Fund of the Ministry of Education and Science of Republic of Serbia (Grant Nos. III-45005 and III-45010) and by the Project within the Cooperation Agreement between the JINR, Dubna, Russian Federation and Ministry of Education and Science of Republic of Serbia.

摘要/Abstract

摘要： We present a study of the physical properties of the vibrational excitation in α-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 has been analyzed by employing the simple mean-field approach based on the variational extension of the Lang-Firsov unitary transformation. Applied approach predicts a region in system parameter space where one takes place an abrupt transition from partially dressed (light and mobile) to fully dressed (immobile) vibron states. We found that the boundary of this region depends on system temperature and type of bond among structural elements in the macromolecular chain.

关键词: vibron, small-polaron, α-helix, partial dressing

Abstract: We present a study of the physical properties of the vibrational excitation in α-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 has been analyzed by employing the simple mean-field approach based on the variational extension of the Lang-Firsov unitary transformation. Applied approach predicts a region in system parameter space where one takes place an abrupt transition from partially dressed (light and mobile) to fully dressed (immobile) vibron states. We found that the boundary of this region depends on system temperature and type of bond among structural elements in the macromolecular chain.

Key words: vibron, small-polaron, α-helix, partial dressing

中图分类号: (Quantum statistical mechanics)

05.30.-d

31.15.xt (Variational techniques) 63.20.kk (Phonon interactions with other quasiparticles) 66.30.hp (Molecular crystals)

D. Čevizović, S. Galović, A. Reshetnyak, Z. Ivić. The vibron dressing in α-helicoidal macromolecular chains[J]. 中国物理B, 2013, 22(6): 60501-060501.

D. Čevizović, S. Galović, A. Reshetnyak, Z. Ivić. The vibron dressing in α-helicoidal macromolecular chains[J]. Chin. Phys. B, 2013, 22(6): 60501-060501.

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The vibron dressing in α-helicoidal macromolecular chains

The vibron dressing in α-helicoidal macromolecular chains

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