41 citations · 632 across the 55 of their papers we have counts for
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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…
The ab initio study of unconventional superconductivity in CeCoIn and FeSe
Andrzej Ptok, Konrad J. Kapcia, Przemysław Piekarz +1
Electronic structure and the shape of the Fermi surface are known to be of fundamental importance for the superconducting instability in real materials. We demonstrate that such an…
Diversity of charge orderings in correlated systems
Konrad Jerzy Kapcia, Jan Barański, Andrzej Ptok
The phenomenon associated with inhomogeneous distribution of electron density is known as a charge ordering. In this work, we study the zero-bandwidth limit of the extended Hubbard…
Phase transitions in quasi-one dimensional system with unconventional superconductivity
Andrzej Ptok, Agnieszka Cichy, Karen Rodríguez +1
The paper is devoted to a study of superconducting properties of population-imbalanced fermionic mixtures in quasi-one dimensional optical lattices. The system can be effectively d…
Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors
Andrzej Ptok, Konrad J. Kapcia, Agnieszka Cichy +2
In this paper we address Lifshitz transition induced by applied external magnetic field in a case of iron-based superconductors, in which a difference between the Fermi level and t…
Critical behaviour in one dimension: unconventional pairing, phase separation, BEC-BCS crossover and magnetic Lifshitz transition
Andrzej Ptok, Agnieszka Cichy, Karen Rodríguez +1
We study the superconducting properties of population-imbalanced ultracold Fermi mixtures in one-dimensional (1D) optical lattices that can be effectively described by the spin-imb…