Претраживање
Приказ резултата 1541-1550 од 1673
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 ...
A model for the chain-to-plane charge transfer in YBa2Cu3O6+x
(Chinese Physics B, 2012)
A model for the chain-to-plane charge transfer is proposed to account for the two plateaus, at 60 K and at 90 K, of the T-c(x) characteristics of the YBa2Cu3O6+x high-T-c superconductor. It is assumed that the number of ...
Thermal and dynamic mechanical properties of bio-based poly(furfuryl alcohol)/sisal whiskers nanocomposites
(Polymer Bulletin, 2013)
In this study, bio-based nanocomposites of sisal whiskers-reinforced poly(furfuryl alcohol) (PFA) were prepared using an in situ polymerization method. Furfuryl alcohol (FA), which is a derived renewable monomer, was used ...
Semiconductor nanoparticles in poly((2-dimethylamino)ethyl methacrylate-co-acrylic acid) co-polymers
(Physica Scripta, 2013)
Nanostructured cadmium selenide (CdSe) and lead sulfide (PbS) semiconductors were prepared in a poly(2-(dimethylamino)ethyl methacrylate-co-acrylic acid) matrix. The obtained nanoparticles were characterized by using optical ...
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 ...
Influence of Ortho-II structural phase on the 60 K plateau formation in YBa2Cu3O6+x
(Physica. C: Superconductivity and Its Applications, 2012)
In the present study, we have employed two dimensional ASYNNNI model to investigate how the Ortho-II structure formation influences doping, p, of the superconducting CuO2 planes in YBa2Cu3O6+x high-T-c superconductor. It ...
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 ...