243 citations · 2.3k across the 105 of their papers we have counts for
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Structural distortions of frustrated quantum spin lattices in high magnetic fields
Oleg Derzhko, Johannes Richter, Jörg Schulenburg
We study the stability of some strongly frustrated antiferromagnetic spin lattices in high magnetic fields against lattice distortions. In particular, we consider a spin-s anisotro…
Dynamics of quantum spin chains and multi-fermion excitation continua
O. Derzhko, T. Krokhmalskii, J. Stolze +1
We use the Jordan-Wigner representation to study dynamic quantities for the spin-1/2 XX chain in a transverse magnetic field. We discuss in some detail the properties of the four-f…
Structural instability of two- and three-dimensional pyrochlore spin lattices in high magnetic fields
Oleg Derzhko, Johannes Richter
We consider the quantum spin- Heisenberg antiferromagnet on the two- and three-dimensional pyrochlore lattices and examine a spin-Peierls mechanism of lowering the total e…
Dimer and trimer fluctuations in the s=1/2 transverse XX chain
Oleg Derzhko, Taras Krokhmalskii, Joachim Stolze +1
Exact results for the dynamic dimer and trimer structure factors of the one-dimensional s=1/2 XX model in a transverse magnetic field () are presented and discussed in…
Quantum Phase Transitions in Spin-1/2 Ising Chain in Regularly Alternating Transverse Field: Spin Correlation Functions
Oleg Derzhko, Taras Krokhmalskii
We consider the spin-1/2 Ising chain in a regularly alternating transverse field to examine the effects of regular alternation on the quantum phase transition inherent in the quant…
Jordan-Wigner Approach to Dynamic Correlations in 2D Spin-1/2 Models
Oleg Derzhko, Taras Krokhmalskii
We discuss the dynamic properties of the square-lattice spin-1/2 XY model obtained using the two-dimensional Jordan-Wigner fermionization approach. We argue the relevancy of the fe…