375 citations · 989 across the 18 of their papers we have counts for
6 papers · 1 filter
Order by disorder and phase transitions in a highly frustrated spin model on the triangular lattice
A. Honecker, D. C. Cabra, H. -U. Everts +2
Frustration has proved to give rise to an extremely rich phenomenology in both quantum and classical systems. The leading behavior of the system can often be described by an effect…
Heisenberg antiferromagnet with anisotropic exchange on the Kagome lattice: Description of the magnetic properties of volborthite
T. Yavors'kii, W. Apel, H. -U. Everts
We study the properties of the Heisenberg antiferromagnet with spatially anisotropic nearest-neighbour exchange couplings on the kagome net, i.e. with coupling J in one lattice dir…
Spatially anisotropic Heisenberg Kagome antiferromagnet
W. Apel, T. Yavors'kii, H. -U. Everts
In the search for spin-1/2 kagome antiferromagnets, the mineral volborthite has recently been the subject of experimental studies [Hiroi et al.,2001]. It has been suggested that th…
Single-hole dynamics in the t-J model
W. Apel, H. -U. Everts, U. Koerner
The quasi-particle weight of a single hole in an antiferromagnetic background is studied in the semiclassical approximation. We start from the t-J model, generalize it to arbitrary…
Magneto-thermodynamics of the spin-1/2 Kagome antiferromagnet
Philippe Sindzingre, Gregoire Misguich, Claire Lhuillier +4
In this paper, we use a new hybrid method to compute the thermodynamic behavior of the spin-1/2 Kagome antiferromagnet under the influence of a large external magnetic field. We fi…
Effective Hamiltonians for holes in antiferromagnets: a new approach to implement forbidden double occupancy
W. Apel, H. -U. Everts, U. Koerner
A coherent state representation for the electrons of ordered antiferromagnets is used to derive effective Hamiltonians for the dynamics of holes in such systems. By an appropriate…