The vibron dressing in α-helicoidal macromolecular chains

Čevizović, Dalibor; Galović, S.; Reshetnyak, Alexander A.; Ivić, Zoran

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

Cited by 14 publications

(26 citation statements)

References 44 publications

(117 reference statements)

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“…1 and 2. Obtained results appear to be consistent with the predictions of our earlier work concerned with the vibron self-trapping in the alpha-helix and two parallel chain structures [14,18]. Briefly, we found that the system parameter space is divided on two characteristic areas: in the first area vibron dressing is a continuous function of the coupling constant S for fixed values of T and B.…”

Section: Physical Foundation Of the Problemsupporting

confidence: 89%

On the vibron-polaron damping in quasi 1D macromolecular chains

Čevizović

Chizhov

Reshetnyak

et al. 2018

J. Phys.: Conf. Ser.

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The properties of the intramolecular vibrational excitation (vibron) in a quasi 1D macromolecular structure are studied. It is supposed that due to the vibron interaction with optical phonon modes, a vibron might form partially dressed small polaron states. The properties of these states are investigated in dependence on the basic system parameters and temperature of a thermal bath. We also investigate the process of damping of the polaron amplitude as a function of temperature and vibron-phonon coupling strength. Two different regimes of the polaron damping are found and discussed.

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Section: Physical Foundation Of the Problemsupporting

confidence: 89%

On the vibron-polaron damping in quasi 1D macromolecular chains

Čevizović

Chizhov

Reshetnyak

et al. 2018

J. Phys.: Conf. Ser.

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“…In order to facilitate an analytic treatment, we assume the equal dressing fraction for all phonon modes introducing the new variational parameter-dressing fraction (δ) taking [5,22,32]…”

Section: Theoretical Modelmentioning

confidence: 99%

On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling

Čevizović

Ivić

Galović

et al. 2016

Physica B: Condensed Matter

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We studied the properties of the intramolecular vibrational excitation (vibron) at finite temperature in a system which consists of two parallel macromolecular chains. It was assumed that vibron interacts exclusively with dispersionless optical phonons and the whole system is considered to be in thermal equilibrium. Particular attention has been paid to the examination of the impact of the temperature and strength of the interchain coupling on the small polaron crossover. For that purpose we employed partial dressing method which enables the study of the degree of the phonon dressing of the vibron excitations in a wide area of system parameter space. We found that in the non-adiabatic regime the degree of dressing as a function of coupling constant continuously increases reflecting the smooth transition of the slightly dressed, practically free vibron, to a heavily dressed one: small polaron. As "adiabaticity" rises this transition becomes increasingly steeper, and finally, in the adiabatic limit, a discontinuous "jump" of the degree of dressing is observed. The interchain coupling manifests itself through the increase of the effective adiabatic parameter of the system.

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“…The further calculations should be made in terms of two independent dimensionless parameters: adiabatic parameter B , determining the character of the lattice deformation engaged in the polaron formation and coupling constant S [2,3]. In the case when quasiparticle interacts with non dispersional optical phonon modes, they become: For the same values of the system parameters, relative diffusivity (i.e.…”

Section: Model Hamiltonian and Polaron Picture In Macromolecular Chainmentioning

confidence: 99%

“…All these processes involve protein molecules as mediators of the long distance energy transfer. According to recent research [2,3,4], vibron self-trapping (ST) in protein macromolecules, and other biological macromolecular chains (MCs), will result in creation of partially dressed rather than fully dressed small polaron state (for solitonic nature of energy ST when the potential well may induced by local distortion of the molecular crystals, see e.g. [5]).…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, the properties of ST vibron state may be quite different compared with the properties of the bare vibron excitation or fully dressed small polaron state. In fact, it was found that for the partially dressed vibrons there exist such values of the system parameters (critical values) for which the quasiparticle state abruptly changes from weakly dressed to heavy dressed, practically localized vibron state [2,3,6,7]. It was also found that the critical values of the system parameters are temperature dependent, and for some biological structures may belong to room temperature interval.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural levels of deformation and failure of heat-resistant 12Cr1MoV steel modified by vacuum arc treatment by Zr+ ion beam

Власов¹,

Panin²,

Сергеев³

et al. 2014

AIP Conference Proceedings

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Abstract. 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.

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The vibron dressing in α-helicoidal macromolecular chains

Cited by 14 publications

References 44 publications

On the vibron-polaron damping in quasi 1D macromolecular chains

On the vibron-polaron damping in quasi 1D macromolecular chains

On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling

Structural levels of deformation and failure of heat-resistant 12Cr1MoV steel modified by vacuum arc treatment by Zr+ ion beam

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