On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling
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2016
Authors
Čevizović, DaliborIvić, Zoran
Galović, Slobodanka
Reshetnyak, Alexander A.
Chizhov, Alexei V.
Article (Published version)
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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 adiaba...tic 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. (C) 2016 Elsevier B.V. All rights reserved.
Keywords:
Vibron / Molecular chain / Polaron / Interchain couplingSource:
Physica B: Condensed Matter, 2016, 490, 9-15Publisher:
- Elsevier
Funding / projects:
- CCQCN - Crete Center for Quantum Complexity and Nanotechnology (EU-FP7-316165)
- Photonics of micro and nano structured materials (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45010)
- Functional, Functionalized and Advanced Nanomaterials (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
- The influence of elementary excitations and conformations to physical properties of the new materials based on strongly correlated low-dimensional systems (RS-MESTD-Basic Research (BR or ON)-171009)
- Ministry of Education and Science of the Russian Federation [K2-2015-007]
DOI: 10.1016/j.physb.2016.02.033
ISSN: 0921-4526; 1873-2135
WoS: 000373195600002
Scopus: 2-s2.0-84961572032
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VinčaTY - JOUR AU - Čevizović, Dalibor AU - Ivić, Zoran AU - Galović, Slobodanka AU - Reshetnyak, Alexander A. AU - Chizhov, Alexei V. PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/990 AB - 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. (C) 2016 Elsevier B.V. All rights reserved. PB - Elsevier T2 - Physica B: Condensed Matter T1 - On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling VL - 490 SP - 9 EP - 15 DO - 10.1016/j.physb.2016.02.033 ER -
@article{ author = "Čevizović, Dalibor and Ivić, Zoran and Galović, Slobodanka and Reshetnyak, Alexander A. and Chizhov, Alexei V.", year = "2016", abstract = "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. (C) 2016 Elsevier B.V. All rights reserved.", publisher = "Elsevier", journal = "Physica B: Condensed Matter", title = "On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling", volume = "490", pages = "9-15", doi = "10.1016/j.physb.2016.02.033" }
Čevizović, D., Ivić, Z., Galović, S., Reshetnyak, A. A.,& Chizhov, A. V.. (2016). On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling. in Physica B: Condensed Matter Elsevier., 490, 9-15. https://doi.org/10.1016/j.physb.2016.02.033
Čevizović D, Ivić Z, Galović S, Reshetnyak AA, Chizhov AV. On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling. in Physica B: Condensed Matter. 2016;490:9-15. doi:10.1016/j.physb.2016.02.033 .
Čevizović, Dalibor, Ivić, Zoran, Galović, Slobodanka, Reshetnyak, Alexander A., Chizhov, Alexei V., "On the vibron nature in the system of two parallel macromolecular chains: The influence of interchain coupling" in Physica B: Condensed Matter, 490 (2016):9-15, https://doi.org/10.1016/j.physb.2016.02.033 . .