2 papers
cond-mat.stat-mech1999
Density Matrix Renormalisation Group Variants for Spin Systems
M. S. L. du Croo de Jongh
This thesis gives an extension for the Density Matrix Renormalisation Group (DMRG) to two dimensions and described a newly developed combination of the DMRG and a Green Function Mo…
cond-mat.stat-mech1996
Spin stiffness in the frustrated Heisenberg antiferromagnet
M. S. L. du Croo de Jongh, P. J. H. Denteneer
We calculate the spin stiffness of the S=1/2 frustrated Heisenberg antiferromagnet directly from a general formula which is evaluated in the Schwinger boson mean-field approximatio…