27 citations · 63 across the 10 of their papers we have counts for
10 papers
Exact solution of a spin-1/2 chain with three-site interactions in a random transverse field: Influence of randomness on quantum phase transition
Volodymyr Derzhko, Oleg Derzhko, Johannes Richter
We present exact results for the ground-state and thermodynamic properties of the spin-1/2 chain with three-site interactions in a random (Lorentzian) transverse field. We dis…
How to recognize a nearly-flat-band ferromagnet by means of thermodynamic measurements?
Volodymyr Derzhko, Janusz Jedrzejewski
We make an attempt at unveiling the thermodynamic "signature" of a specific class of electronic systems, the so called nearly-flat-band paramagnets and ferromagnets that can theore…
On the nature of striped phases: Striped phases as a stage of "melting" of 2D crystals
Volodymyr Derzhko, Janusz Jedrzejewski, Taras Krokhmalskii
We discuss striped phases as a state of matter intermediate between two extreme states: a crystalline state and a segregated state. We argue that this state is very sensitive to we…
Stability and properties of striped phases in systems of interacting fermions or hard-core bosons
Volodymyr Derzhko
In this thesis we deal with the specific collective phenomena in condensed matter - striped-structures formation. Such structures are observed in different branches of condensed ma…
Influence of anisotropic next-nearest-neighbor hopping on diagonal charge-striped phases
V. Derzhko
We consider the model of strongly-correlated system of electrons described by an extended Falicov-Kimball Hamiltonian where the stability of some axial and diagonal striped phases…
Charge-stripe phases versus a weak anisotropy of nearest-neighbor hopping
V. Derzhko, J. Jedrzejewski
Recently, we demonstrated rigorously the stability of charge-stripe phases in quantum-particle systems that are described by extended Falicov-Kimball Hamiltonians, with the quantum…