243 citations · 2.3k across the 105 of their papers we have counts for
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cond-mat.stat-mech2004★ 4 cited
Quantum phase transitions in alternating transverse Ising chains
Oleg Derzhko
This chapter is devoted to a discussion of quantum phase transitions in regularly alternating spin-1/2 Ising chain in a transverse field. After recalling some generally-known topic…
cond-mat.stat-mech2004★ 19 cited
Regularly alternating spin-1/2 anisotropic XY chains: The ground-state and thermodynamic properties
Oleg Derzhko, Johannes Richter, Taras Krokhmalskii +1
Using the Jordan-Wigner transformation and continued fractions we calculate rigorously the thermodynamic quantities for the spin-1/2 transverse Ising chain with periodically varyin…
cond-mat.stat-mech2004★ 104 cited
Finite low-temperature entropy of some strongly frustrated quantum spin lattices in the vicinity of the saturation field
Oleg Derzhko, Johannes Richter
For a class of highly frustrated antiferromagnetic quantum spin lattices the ground state exhibits a huge degeneracy in high magnetic fields due to the existence of localized magno…