Phonon hardening due to the small-polaron effect

Ivić, Zoran; Zeković, Slobodan; Čevizović, Dalibor; Kostić, Dragan

doi:10.1016/j.physb.2004.11.070

Cited by 12 publications

(3 citation statements)

References 33 publications

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“…This point appears by the consequence of the fact that the SP dressing fraction (and consequently quasiparticle effective mass) increases as temperature grows, but it also increases with the increases of coupling constant value. [38] On the other hand, for small and medium values of S our results significantly differ from those predicted by standard LF theory. In contrast to the standard SP theory, in that limit our approach predicts slightly dressed or partially dressed vibron states (instead of characteristic parabolic shape, the adiabatic curves E GS (S) has linear dependence of coupling constant).…”

Section: E Gcontrasting

confidence: 77%

“…These observations seem to be not surprising, because of the framework of the standard small-polaron approach, the growth of the system temperature has practically the same effect as the growth of the coupling constant. This point appears by the consequence of the fact that the SP dressing fraction (and consequently quasiparticle effective mass) increases as temperature grows, but it also increases with the growth of coupling constant value [38].…”

Section: Resultsmentioning

confidence: 99%

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The vibron dressing in α-helicoidal macromolecular chains

Čevizović¹,

Galović²,

Reshetnyak³

et al. 2013

Chinese Phys. B

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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.The authors are grateful to I. Bondarev, for valuable comments and discussion on possibility of coexistence two vibron states, mobile and immobile ones.

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Section: E Gcontrasting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

The vibron dressing in α-helicoidal macromolecular chains

Čevizović¹,

Galović²,

Reshetnyak³

et al. 2013

Chinese Phys. B

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“…It is responsible for some important phenomena, SP mobility in particular, and deserves a separate examination. Some possible consequences have been examined within the strong-coupling approximation in [23]. The vibron operators are taken in the Fourier representation for convenience: a k = 1 √ N n e iknR 0 a n ,…”

Section: Theoretical Analysismentioning

confidence: 99%

Nature of the vibron self-trapped states in hydrogen-bonded macromolecular chains

2011

Self Cite

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We study the influence of temperature and the values of basic energy parameters on the character of vibron self-trapped states in quasi-one-dimensional hydrogen-bonded molecular chains. Investigations have been carried out within the one-dimensional Holstein molecular crystal model employing the variational extension of the Lang-Firsov unitary transformation. It was found that, in the low-temperature regime, only partially dressed small-polaron states may exist. With the rise of temperature, the system enters the metastability region, where partially dressed (light and mobile) and fully dressed (heavy and practically immobile) small-polaron states may exist simultaneously.

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Vibron Self-trapping in Quasi-One-Dimensional Biomolecules: Non-adiabatic Polaron Approach

Čevizović¹

2022

Nonlinear Dynamics of Nanobiophysics

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Phonon hardening due to the small-polaron effect

Cited by 12 publications

References 33 publications

The vibron dressing in α-helicoidal macromolecular chains

The vibron dressing in α-helicoidal macromolecular chains

Nature of the vibron self-trapped states in hydrogen-bonded macromolecular chains

Vibron Self-trapping in Quasi-One-Dimensional Biomolecules: Non-adiabatic Polaron Approach

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