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Boundary between coherent and noncoherent small polaron motion: Influence of the phonon hardening
(Physica B: Condensed Matter, 2009)
The transition from band to hopping conductivity of small polaron is examined within Holsteins molecular crystal model. The conditions under which each of these mechanisms prevail are formulated in terms of the values of ...
Photothermal microscopy: a step from thermal wave visualization to spatially localized thermal analysis
(Journal of Microscopy, Oxford, 2008)
The calculation of photothermal response detected by a photothermal microscope is presented. By using a technique based on Greens functions and integral transforms, a model for laser-induced temperature distribution functions ...
Influence of the electron-phonon iinteraction on phonon heat conduction in a molecular nanowire
(Science of Sintering, 2006)
A model for phonon heat conduction in a molecular nanowire is developed. The calculation takes into account modification of the acoustic phonon dispersion relation due to the electron-phonon interaction. The results obtained ...
Small-polaron resistivity of the narrow band molecular chain: The influence of phonon hardening
(Physica B: Condensed Matter, 2005)
We study the effect of the small-polaron induced changes of phonon spectra on charge transfer in molecular solids. Noticeable discrepancy with the predictions of the traditional small-polaron theories is observed: accounting ...
Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material
(Physica. C: Superconductivity and Its Applications, 2007)
According to the charge transfer model of Kudinov et a]. the photoinduced enhancement of conductivity in YBa2Cu3O6+x material can be explained by the photoexcitation of electron-hole pairs, and the subsequent transfer of ...
Electronic structure for the two-band Hubbard model of the ladder alpha -NaV2O5 compound
(International Journal of Modern Physics B, 2005)
An effective Hubbard model for one-particle d-like states and two-particle singlet states is derived in order to describe the low-energy electronic spectrum in ladder alpha-NaV2O5 compound. The energy shifts and the ...
Geometric distribution of CuO chains in YBa2Cu3O6+x
(Physica. C: Superconductivity and Its Applications, 2006)
Statistics of CuO chains in basal planes of YBa2Cu3O6+x high-T-c superconductor has been studied in terms of two dimensional asymmetric next-to-nearest-neighbor Ising (ASYNNNI) model, with accentuation on distribution of ...
Phase diagram of oxygen ordering in YBa2Cu3O6+2c. The three-atom interactions
(Physica. C: Superconductivity and Its Applications, 2005)
A cluster variation method (CVM) has been used to calculate the phase diagram of oxygen ordering in YBa2-Cu3O6+2c in terms of two dimensional Ising model that, besides of repulsive nearest-neighbor (NN) interaction V-1 GT ...
A Monte Carlo study on distribution of CuO chains in YBa2Cu3O6+2c
(Physica. C: Superconductivity and Its Applications, 2005)
Distribution of CuO chains in YBa2Cu3O6+2c, with respect to different chain lengths, has been studied in terms of the two dimensional asymmetric next-nearest-neighbor Ising (ASYNNNI) model, for the case of orthorhombic-I ...
Surface-time enlargement law for gas breakdown
(IEEE Transactions on Dielectrics and Electrical Insulation, 2008)
This paper investigates, through theory and experiment, the applicability of the results obtained in laboratory tests of relatively short duration performed on model structures, as a part of the process of designing ...