243 citations · 2.3k across the 105 of their papers we have counts for
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Localized states on triangular traps and low-temperature properties of the antiferromagnetic Heisenberg and repulsive Hubbard models
Mykola Maksymenko, Oleg Derzhko, Johannes Richter
We consider the antiferromagnetic Heisenberg and the repulsive Hubbard model on two -site one-dimensional lattices, which support dispersionless one-particle states correspondin…
Quantum Heisenberg antiferromagnet on low-dimensional frustrated lattices
Oleg Derzhko, Taras Krokhmalskii, Johannes Richter
Using a lattice-gas description of the low-energy degrees of freedom of the quantum Heisenberg antiferromagnet on the frustrated two-leg ladder and bilayer lattices we examine the…
Ground-state properties of the spin-1/2 Heisenberg-Ising bond alternating chain with Dzyaloshinskii-Moriya interaction
J. Strecka, L. Galisova, O. Derzhko
Ground-state energy is exactly calculated for the spin-1/2 Heisenberg-Ising bond alternating chain with the Dzyaloshinskii-Moriya interaction. Under certain condition, which relate…