Magnetic order in the Shastry-Sutherland model
Physics Department, University of Wuppertal, 42097 Wuppertal, Germany
Corresponding author: a firstname.lastname@example.org
Revised: 15 January 2002
Published online: 15 March 2002
The ground state properties of the Shastry-Sutherland model in the presence of an external field are investigated by means of variational states built up from unpaired spins (monomers) and singlet pairs of spins (dimers). The minimum of the energy is characterized by specific monomer-dimer configurations, which visualize the magnetic order in the sectors with fixed magnetization M=S/N. A change in the magnetic order is observed if the frustrating coupling α exceeds a critical value , which depends on M. Special attention is paid to the ground state configurations at M=1/4, 1/6, 1/8.
PACS: 75.10.-b – General theory and models of magnetic ordering / 75.10.Jm – Quantized spin models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002