Boson Mean Field Theory of the Triangular Lattice Heisenberg Model

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概要

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• Two-dimensional spin-1 / 2 antiferromagnetic Heisenberg model on a triangular Ratlice is investigated by a mean field theory. The spin is expressed by Schwinger bosons,and order parameters corresponding to the resonating valence bond (RVB) state isretained. Due to the frustration built in the model, the ground state of this model hasnot been clarified. In the present method the lowest energy solution has a long rangeorder at T=O, which corresponds to the classical 120' structure. Other self-consistentsolutions, including that which has no long range order, are also found. Properties ofthese solutions are examined.[triangular lattice, Fleisenberg model, Schwinger boson, two-dimension, RVB, ll specific heat, susceptibility, correlation lengthl

• 社団法人日本物理学会の論文
• 1991-02-15

著者

• MIYAZAKI Jun

  Department of Urology, Institute of Clinical Medicine, University of Tsukuba

• Yoshioka Daijiro

  Department Of Physics Kyushu University

• Yoshioka Daijiro

  Department Of Basic Science Graduate School Of Arts And Sciences University Of Tokyo

• Miyazaki J

  Japan Advanced Inst. Sci. And Technol. Ishikawa‐ken Jpn

• Miyazaki Jun

  Department Of Internal Medicine Odaira-memorial Tokyo Hitachi Hospital

• Yoshioka Daijiro

  Department of Physics,Kyushu University

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