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Quantum phase transitions of the S=1 Shastry-Sutherland model
Akihisa Koga, Norio Kawakami, Manfred Sigrist
We investigate quantum phase transitions of the two-dimensional S=1 Shastry-Sutherland model, which is characterized by the frustrated orthogonal-dimer structure, by means of the e…
Inhomogeneously doped two-leg ladder systems
Stefan Wessel, Martin Indergand, Andreas Laeuchli +2
A chemical potential difference between the legs of a two-leg ladder is found to be harmful for Cooper pairing. The instability of superconductivity in such systems is analyzed by…
Magnon Dispersion in the Field-Induced Magnetically Ordered Phase of TlCuCl3
Masashige Matsumoto, B. Normand, T. M. Rice +1
The magnetic properties of the interacting dimer system TlCuCl3 are investigated within a bond-operator formulation. The observed field-induced staggered magnetic order perpendicul…
Phase Diagram of the quadrumerized Shastry-Sutherland Model
Andreas Laeuchli, Stefan Wessel, Manfred Sigrist
We determine the phase diagram of a generalized Shastry-Sutherland model, using a combination of dimer- and quadrumer-boson methods and numerical exact diagonalization techniques.…