124 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Aix-Marseille UniversitéFR3 papers
- Centre National de la Recherche ScientifiqueFR3 papers
- Université de SherbrookeCA3 papers
- AGH University of KrakowPL2 papers
- Cadi Ayyad UniversityMA2 papers
- Centre de physique des particules de MarseilleFR2 papers
- Centre for Cosmology and Particle Physics PhenomenologyDK2 papers
- Charles UniversityCZ2 papers
- Cidete (Spain)ES2 papers
- Comenius University BratislavaSK2 papers
- Czech Technical University in PragueCZ2 papers
- École Nationale Supérieure d'Ingénieurs de CaenFR2 papers
19 papers · 1 filter
-electrons contribution to cohesive energy of -metals
L. Didukh
In this paper a model for -subsystem of transition -metals has been proposed and used for calculation of the cohesive energy dependent on -band filling of particular me…
Phase Diagram of Metal-Insulator Transition in System with Anderson-Hubbard Centers
Yuriy Skorenkyy, Leonid Didukh, Oleksandr Kramar +1
The model of a strongly correlated system in which periodically spaced Anderson-Hubbard centers are introduced into narrow-band metal is considered. Besides the interactions betwee…
Magnetic field dependence of conductivity and effective mass of carriers in a model of Mott-Hubbard material
L. Didukh, O. Kramar, Yu. Skorenkyy +1
The influence of external magnetic field on a static conductivity of Mott-Hubbard material which is described by model with correlated hopping of electrons has been investigate…
Strong- and weak-coupling mechanisms for pseudogap in electron-doped cuprates
V. Hankevych, B. Kyung, A-M. Dare +2
Using the two-particle self-consistent approach and cluster perturbation theory for the two-dimensional t-t'-t''-U Hubbard model, we discuss weak- and strong-coupling mechanisms fo…
Pseudogap and Spin Fluctuations in the Normal State of Electron-Doped Cuprates
B. Kyung, V. Hankevych, A. -M. Dare +1
We present reliable many-body calculations for the t-t'-t''-U Hubbard model that explain in detail the results of recent angle-resolved photoemission experiments on electron-doped…
Weak ferromagnetism and other instabilities of the two-dimensional t-t' Hubbard model at Van Hove fillings
V. Hankevych, B. Kyung, A. -M. S. Tremblay
We investigate magnetic and superconducting instabilities of the two-dimensional t-t' Hubbard model on a square lattice at Van Hove densities from weak to intermediate coupling by…
Pomeranchuk and other Instabilities in the t-t' Hubbard model at the Van Hove Filling
V. Hankevych, I. Grote, F. Wegner
We present a stability analysis of the two-dimensional t-t' Hubbard model for various values of the next-nearest-neighbor hopping t', and electron concentrations close to the Van H…
On metallic ferromagnetism of a generalized Hubbard model with correlated hopping
L. Didukh, O. Kramar
In the paper a possibility of metallic ferromagnetic state realization in a generalized Hubbard model with more complete accounting of electron-electron interactions, in particular…
Ground state ferromagnetism in a doubly orbitally degenerate model
L. Didukh, Yu. Skorenkyy, V. Hankevych +1
In the present paper the ground state of a double orbitally degenerate model at weak intra-atomic interaction is studied using the Green functions method. Beside the diagonal matri…
Ground state energy of metallic ferromagnet in a generalized Hubbard model
L. Didukh, O. Kramar, Yu. Skorenkyy
In the present work ferromagnetic ordering in the Hubbard model generalized by taking into account the inter-atomic exchange interaction and correlated hopping in partially filled…
Pressure-Temperature Phase Diagram of Generalized Hubbard Model with Correlated Hopping at Half-Filling
Leonid Didukh, Vasyl Hankevych
In the present paper pressure-temperature phase diagram of a generalized Hubbard model with correlated hopping in a paramagnetic state at half-filling is determined by means of the…
Some Low-Temperature Properties of a Generalized Hubbard Model with Correlated Hopping
L. Didukh, V. Hankevych, Yu. Skorenkyy
In the present paper we study some correlation effects in a generalized Hubbard model with correlated hopping within low-temperature region using a generalized mean-field approxima…
Electron Correlations in Narrow Energy Bands: Ground State Energy and Metal-Insulator Transition
Leonid Didukh, Yuriy Skorenkyy
The electron correlations in narrow energy bands are examined in framework of the Hubbard model. The single-particle Green function and energy spectrum are obtained in paramagnetic…
A New Two-Pole Approximation in the Hubbard Model. Metal-Insulator Transition
Leonid Didukh
A new two-pole approximation, which allows to describe the transition from an insulating state to a metallic one at increase of bandwidth, and also the observable in some compounds…
On Chemical Potential of a Generalized Hubbard Model with Correlated Hopping at Half-Filling
Leonid Didukh, Vasyl Hankevych
In the present paper we study chemical potential of a generalized Hubbard model with correlated hopping at half-filling using a generalized mean-field approximation. For the specia…
Metal-insulator transition in a doubly orbitally degenerate model with correlated hopping
L. Didukh, Yu. Skorenkyy, Yu. Dovhopyaty +1
In the present paper we propose a doubly orbitally degenerate narrow-band model with correlated hopping. The peculiarity of the model is taking into account the matrix element of e…
A modified form of the polar model of crystals
Leonid Didukh
A model for description of materials with narrow energy bands is proposed. It is shown that in narrow-band materials electron-hole symmetry is absent in contrast to the Hubbard mod…
Temperature-Induced Metal-Insulator Transition in a Narrow-Band Model with Non-Equivalent Hubbard Subbands at Half-Filling
Leonid Didukh, Vasyl Hankevych
In the previous papers (Journ. of Phys. Stud. 2, 362 (1998); cond-mat/9811213) we have studied metal-insulator transition in a generalized Hubbard model with correlated hopping at…
Metal-Insulator Transition in a Generalized Hubbard Model with Correlated Hopping at Half-Filling
Leonid Didukh, Vasyl Hankevych
In the present paper metal-insulator transition is studied in a generalized Hubbard model with correlated hopping at half-filling and zero temperature. Single-particle Green functi…