243 citations · 2.3k across the 105 of their papers we have counts for
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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…
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…
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…