Site-Dilution-Induced Antiferromagnetic Long-Range Order in Two-Dimensional Spin-Gapped Heisenberg Antiferromagnet
Yasuda, Chitoshi · Todo, Synge · Matsumoto, Munehisa · Takayama, Hajime
Original · EN
Effects of the site dilution on spin-gapped Heisenberg antiferromagnets with S=1/2 and S=1 on a square lattice are investigated by means of the quantum Monte Carlo method. It is found that effective magnetic moments induced around the diluted sites exhibit the antiferromagnetic long-range order in the medium of spin-singlet pairs. Their microscopic structure is examined in detail and important roles of the higher dimensionality than one on the phenomenon are discussed.
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