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Comment on "Unconventional Magnetism in a Nitrogen-Containing Analog of Cupric Oxide"
Alexander A. Tsirlin, Helge Rosner
In a recent Letter [PRL, 107, 047208 (2011)], Zorko et al. report on an "unexpected inhomogeneous magnetism" related to "a peculiar fragility" of the resonating-valence-bond (RVB)…
Decorated Shastry-Sutherland lattice in the spin-1/2 magnet CdCu2(BO3)2
O. Janson, I. Rousochatzakis, A. A. Tsirlin +3
We report the microscopic magnetic model for the spin-1/2 Heisenberg system CdCu2(BO3)2, one of the few quantum magnets showing the 1/2-magnetization plateau. Recent neutron diffra…
Magnetic properties of the low-dimensional spin-1/2 magnet α-Cu_2As_2O_7
Y. C. Arango, E. Vavilova, M. Abdel-Hafiez +11
In this work we study the interplay between the crystal structure and magnetism of the pyroarsenate α-Cu_2As_2O_7 by means of magnetization, heat capacity, electron spin resonance…
Superposition of ferromagnetic and antiferromagnetic spin chains in the quantum magnet BaAg2Cu[VO4]2
Alexander A. Tsirlin, Angela Moeller, B. Lorenz +2
Based on density functional theory band structure calculations, quantum Monte-Carlo simulations, and high-field magnetization measurements, we address the microscopic magnetic mode…
Magnetic model for A2CuP2O7 (A = Na, Li) revisited: 1D versus 2D behavior
S. Lebernegg, A. A. Tsirlin, O. Janson +4
We report magnetization measurements, full-potential band structure calculations, and microscopic modeling for the spin-1/2 Heisenberg magnets A2CuP2O7 (A = Na, Li). Based on a qua…
Orbital order and magnetism of FeNCN
Alexander A. Tsirlin, Klaus Koepernik, Helge Rosner
Based on density functional calculations, we report on the orbital order and microscopic magnetic model of FeNCN, a prototype compound for orbital-only models. Despite having a sim…