Phase diagram of the spin-1/2 J1-J2-J3 Heisenberg model on the square lattice
作者： Nic Shannon , Tsutomu Momoi , Philippe Sindzingre
DOI: 10.1088/1742-6596/200/2/022058
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摘要: We presents the results of an extensive numerical study phase diagram spin-1/2, J1-J2-J3 Heisenberg model on a square lattice, for both ferromagnetic and antiferromagnetic nearest-neighbor interactions J1, using exact diagonalization with periodic twisted boundary conditions. Comparison is made published spin wave calculations. show that quantum fluctuations play very important role, changing extent vector classical spiral phases, leading to new phases where states have high degeneracy. These include small or vanishing spin-stiffness, in addition known valence-bond-solid bond-nematic phases.
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