Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-04-05
Phys. Rev. E 74, 035601 (2006)
Physics
Condensed Matter
Other Condensed Matter
10 pages, 11 Figures
Scientific paper
10.1103/PhysRevE.74.026701
We have applied a variational algorithm based on Projected Entangled Pair States (PEPS) to a two dimensional frustrated spin system, the spin-1/2 antiferromagnetic Heisenberg model on the Shastry-Sutherland lattice. We use the class of PEPS with internal tensor dimension D=2, the first step beyond product states (D=1 PEPS). We have found that the D=2 variational PEPS algorithm is able to capture the physics in both the valence-bond crystal and the Neel ordered state. Also the spin-textures giving rise to the magnetization plateaus seen in experiments on SrCu$_2$(BO$_3$)$_2$ are well reproduced. This shows that PEPS with the smallest nontrivial internal dimension, D=2, can provide valuable insights into frustrated spin-systems.
Isacsson Andreas
Syljuasen Olav F.
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