146 citations · 278 across the 6 of their papers we have counts for
3 papers · 1 filter
SrCu_2(BO_3)_2 - a Two Dimensional Spin Liquid
Christian Knetter, Alexander Buehler, Erwin Mueller-Hartmann +1
We study an extended Shastry-Sutherland model for SrCu_2(BO_3)_2 and analyze the low lying parts of the energy spectrum by means of a perturbative unitary transformation based on f…
Dispersion and Symmetry of Bound States in the Shastry-Sutherland Model
Christian Knetter, Alexander Buehler, Erwin Mueller-Hartmann +1
Bound states made from two triplet excitations on the Shastry-Sutherland (ShaSu) lattice are investigated. Based on the perturbative unitary transformation by flow equations quanti…
High Temperature Expansion for Frustrated and Unfrustrated S=1/2 Spin Chains
Alexander Buehler, Norbert Elstner, Goetz S. Uhrig
A computer aided high temperature expansion of the magnetic susceptibility and the magnetic specific heat is presented and demonstrated for frustrated and unfrustrated spin chains.…