28 citations · 34 across the 3 of their papers we have counts for
5 papers · 1 filter
Plaquette Order in the J1-J2-J3 model: a series expansion analysis
Marcelo Arlego, Wolfram Brenig
Series expansion based on the flow equation method is employed to study the zero temperature properties of the spin-1/2 J1-J2-J3 antiferromagnet in two dimensions. Starting from th…
Series expansion analysis of a tetrahedral cluster spin chain
Marcelo Arlego, Wolfram Brenig
Using series expansion by continuous unitary transformations we study the magnetic properties of a frustrated tetrahedral spin-1/2 chain. Starting from the limit of isolated tetrah…
Bound states in weakly disordered spin ladders
M. Arlego, W. Brenig, D. C. Cabra +3
We study the appearance of bound states in the spin gap of spin-1/2 ladders induced by weak bond disorder. Starting from the strong-coupling limit, i.e., the limit of weakly couple…
Bond-impurity induced bound states in disordered spin-1/2 ladders
M. Arlego, W. Brenig, D. C. Cabra +3
We discuss the effect of weak bond-disorder in two-leg spin ladders on the dispersion relation of the elementary triplet excitations with a particular focus on the appearance of bo…
Competing interactions in the XYZ model
M. Arlego, D. C. Cabra, J. E. Drut +1
We study the interplay between a XY anisotropy , exchange modulations and an external magnetic field along the z direction in the XYZ chain using bosonization and Lanczos diagon…