61 citations · 276 across the 20 of their papers we have counts for
21 papers
Thermodynamic and electromagnetic properties of the eta-pairing superconductivity in the Penson-Kolb model
Wojciech R. Czart, Konrad J. Kapcia, Roman Micnas +1
In the paper, we study the thermodynamic and electromagnetic properties of the Penson-Kolb (PK) model, i.e., the tight-binding model for fermionic particles with the pair-hopping i…
Extended Falicov-Kimball model: Exact solution for finite temperatures
Konrad Jerzy Kapcia, Romuald Lemański, Stanisław Robaszkiewicz
The extended Falicov-Kimball model is analyzed exactly for finite temperatures () in the limit of large dimensions. Onsite and intersite density-density interactions an…
Extended Falicov-Kimball model: exact solution for the ground state
Romuald Lemański, Konrad Jerzy Kapcia, Stanisław Robaszkiewicz
The extended Falicov-Kimball model is analyzed exactly in the ground state at half filling in the limit of large dimensions. In the model the on-site and the intersite density-dens…
Doping driven metal-insulator transitions and charge orderings in the extended Hubbard model
K. J. Kapcia, S. Robaszkiewicz, M. Capone +1
We perform a thorough study of an extended Hubbard model featuring local and nearest-neighbor Coulomb repulsion. Using dynamical mean-field theory we investigated the zero temperat…
Monte Carlo study of phase separation in magnetic insulators
Szymon Murawski, Konrad Jerzy Kapcia, Grzegorz Pawłowski +1
In this work we focus on the study of phase separation in the zero-bandwidth extended Hubbard with nearest-neighbors intersite Ising-like magnetic interactions and on-site Coul…
Some exact results for the zero-bandwidth extended Hubbard model with intersite charge and magnetic interactions
Konrad Jerzy Kapcia, Waldemar Kłobus, Stanisław Robaszkiewicz
The extended Hubbard model in the zero-bandwidth limit is studied. The effective Hamiltonian consists of (i) on-site interaction and intersite (ii) density-density interaction…