26 citations · 40 across the 2 of their papers we have counts for
2 papers
cond-mat.str-el2004★ 14 cited
Theoretical studies of the phase transition in the anisotropic 2-D square spin lattice
Mohamad Al Hajj, Nathalie Guihery, Jean-Paul Malrieu +1
The phase transition occurring in a square 2-D spin lattice governed by an anisotropic Heisenberg Hamiltonian has been studied according to two recently proposed methods. The first…
cond-mat.str-el2004★ 26 cited
A renormalized excitonic method in terms of block excitations. Application to spin lattices
Mohamad Al Hajj, Jean-Paul Malrieu, Nathalie Guihéry
Dividing the lattice into blocks with singlet ground state and knowing the exact low energy spectrum of the blocks and of dimers (or trimers) of blocks, it is possible to approach…