https://doi.org/10.1140/epjb/e20020082
Magnetic order in the Shastry-Sutherland model
Physics Department, University of Wuppertal, 42097 Wuppertal, Germany
Corresponding author: a fledderj@theorie.physik.uni-wuppertal.de
Received:
8
November
2001
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
