243 citations · 2.3k across the 105 of their papers we have counts for
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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…
Emergent Ising degrees of freedom in frustrated two-leg ladder and bilayer Heisenberg antiferromagnets
Oleg Derzhko, Taras Krokhmalskii, Johannes Richter
Based on exact diagonalization data for finite quantum Heisenberg antiferromagnets on two frustrated lattices (two-leg ladder and bilayer) and analytical arguments we map low-energ…
Magnetic properties of the Hubbard model on kagome stripes
O. Derzhko, M. Maksymenko, J. Richter +2
We consider the one-orbital -site repulsive Hubbard model on two kagome-like chains, both of which yield a completely dispersionless (flat) one-electron band. Using exact many-e…