920 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Academy of Sciences of UkraineUA354 papers
- Lviv UniversityUA86 papers
- Coventry UniversityGB63 papers
- Lviv Polytechnic National UniversityUA61 papers
- Johannes Kepler University of LinzAT57 papers
- Centre National de la Recherche ScientifiqueFR55 papers
- Otto-von-Guericke-Universität MagdeburgDE42 papers
- University of Pavol Jozef ŠafárikSK27 papers
- Université de LorraineFR26 papers
- Georgetown UniversityUS21 papers
- Max Planck Institute for the Physics of Complex SystemsDE20 papers
- Institute of Physical ChemistryPL16 papers
11 papers · 2 filters
Jordan-Wigner Fermionization and the Theory of Low-Dimensional Quantum Spin Models. Dynamic Properties
Oleg Derzhko
The Jordan-Wigner transformation is known as a powerful tool in condensed matter theory, especially in the theory of low-dimensional quantum spin systems. The aim of this chapter i…
Dynamic properties of the spin-1/2 XY chain with three-site interactions
Taras Krokhmalskii, Oleg Derzhko, Joachim Stolze +1
We consider a spin-1/2 XY chain in a transverse (z) field with multi-site interactions. The additional terms introduced into the Hamiltonian involve products of spin components rel…
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…
Nonresonant Raman and inelastic X-ray scattering in the charge-density-wave phase of the spinless Falicov-Kimball model
O. P. Matveev, A. M. Shvaika, J. K. Freericks
Nonresonant inelastic light and X-ray scattering is investigated for the spinless Falicov-Kimball model on an infinite-dimensional hypercubic lattice with a charge-density-wave pha…
Exact low-temperature properties of a class of highly frustrated Hubbard models
Oleg Derzhko, Andreas Honecker, Johannes Richter
We study the repulsive Hubbard model both analytically and numerically on a family of highly frustrated lattices which have one-electron states localized on isolated trapping cells…
Ground-state phases of the spin-1/2 J_1-J_2 Heisenberg antiferromagnet on the square lattice: A high-order coupled cluster treatment
R. Darradi, O. Derzhko, R. Zinke +3
Using the coupled cluster method for high orders of approximation and complementary exact diagonalization studies we investigate the ground state properties of the spin-1/2 --…
The sawtooth chain: From Heisenberg spins to Hubbard electrons
J. Richter, O. Derzhko, A. Honecker
We report on recent studies of the spin-half Heisenberg and the Hubbard model on the sawtooth chain. For both models we construct a class of exact eigenstates which are localized d…
Electronic Duality in Strongly Correlated Matter
T. Park, M. J. Graf, L. Boulaevskii +2
Superconductivity develops from an attractive interaction between itinerant electrons that creates electron pairs which condense into a macroscopic quantum state--the superconducti…
F-electron spectral function of the Falicov-Kimball model and the Wiener-Hopf sum equation approach
A. M. Shvaika, J. K. Freericks
We derive an alternative representation for the -electron spectral function of the Falicov-Kimball model from the original one proposed by Brandt and Urbanek. In the new represe…
Electronic charge and orbital reconstruction at cuprate-titanate interfaces
Natalia Pavlenko, Thilo Kopp
In complex transition metal oxide heterostructures of physically dissimilar perovskite compounds, interface phenomena can lead to novel physical properties not observed in either o…
Dynamic properties of quantum spin chains: Simple route to complex behavior
Taras Verkholyak, Oleg Derzhko, Taras Krokhmalskii +1
We examine dynamic structure factors of spin-1/2 chains with nearest-neighbor interactions of XX and Dzyaloshinskii-Moriya type, and with periodic and random changes in the sign of…