59 citations · 142 across the 4 of their papers we have counts for
4 papers
Competition between Hund's coupling and Kondo effect in a one-dimensional extended periodic Anderson model
I. Hagymasi, J. Solyom, O. Legeza
We study the ground-state properties of an extended periodic Anderson model to understand the role of Hund's coupling between localized and itinerant electrons using the density-ma…
Topological Order, Dimerization, and Spinon Deconfinement in Frustrated Spin Ladders
Eugene H. Kim, Ö. Legeza, J. Sólyom
We consider topological order and dimer order in several frustrated spin ladder models, which are related to higher dimensional models of current interest; we also address the occu…
Fluctuations in subsystems of the zero temperature XX chain: Emergence of an effective temperature
V. Eisler, O. Legeza, Z. Racz
The zero-temperature XX chain is studied with emphasis on the properties of a block of spins inside the chain. We investigate the quantum fluctuations resulting from the entang…
String order in spin liquid phases of spin ladders
G. Fath, O. Legeza, J. Solyom
Two-leg spin ladders have a rich phase diagram if rung, diagonal and plaquette couplings are allowed for. Among the possible phases there are two Haldane-type spin liquid phases wi…