Exact bounds on the critical frustration in the Shastry – Sutherland Model
نویسنده
چکیده
We discuss the phase diagram of the Shastry–Sutherland model for arbitrary spin S and derive rigorous lower and upper bounds on the phase boundaries of the dimer phase by using various versions of a variational ansatz in combination with the exact diagonalisation method.
منابع مشابه
Antiferromagnetic Metal and Mott Transition on Shastry-Sutherland Lattice
The Shastry-Sutherland lattice, one of the simplest systems with geometrical frustration, which has an exact eigenstate by putting singlets on diagonal bonds, can be realized in a group of layered compounds and raises both theoretical and experimental interest. Most of the previous studies on the Shastry-Sutherland lattice are focusing on the Heisenberg model. Here we opt for the Hubbard model ...
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تاریخ انتشار 2008