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Broken discrete symmetries in a frustrated honeycomb antiferromagnet
H. D. Rosales, D. C. Cabra, C. A. Lamas +2
We study the magnetic phase diagram of the -- Heisenberg antiferromagnet on a honeycomb lattice at the strongly frustrated point using large-scale Monte Car…
Statistical transmutation in doped quantum dimer models
C. A. Lamas, A. Ralko, D. C. Cabra +2
We prove a "statistical transmutation" symmetry of doped quantum dimer models on the square, triangular and kagome lattices: the energy spectrum is invariant under a simultaneous c…
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…
Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets
C. A. Lamas, S. Capponi, P. Pujol
We investigate the magnetic properties of quasi-one-dimensional quantum spin-S antiferromagnets. We use a combination of analytical and numerical techniques to study the presence o…
Site-centered impurities in quantum spin chains
P. Pujol, J. Rech
The magnetic behavior of antiferromagnetic spin 1/2 chains with site-centered impurities in a magnetic field is investigated. The effect of impurities is implemented by considering…
Hubbard ladders in a magnetic field
D. C. Cabra, A. De Martino, P. Pujol +1
The behavior of a two leg Hubbard ladder in the presence of a magnetic field is studied by means of Abelian bosonization. We predict the appearance of a new (doping dependent) plat…