Spin-Wave Theory of Modified Quantum Heisenberg Model

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概要

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• The modified quantum Heisenberg rnodel (MQHM) is proposed. The lVIQHlV[ is characterizedby the following exchange interactions: First, the interactions fall off as inverse square of thedistance between sites and have alternate positive and negative signs with increasing distancebetween sites. Secondly, the interactions work well only along the coordinate axes. By use of thespin-wave theory based on the Holstein-Primakoff transformation, the ground-state propertiesand the possibility of a finite-temperature phase transition are investigated. Within the linearspin-wave approximation, it is shown that in the antiferromagnetic naodel, there exists a zero-temperature Nc5el order in one dimension and OCCLIIS a finite-temperature phase transition in twodimensins.

• 社団法人日本物理学会の論文
• 1996-05-15

著者

• Aoki Tosizumi

  Gunma College Of Technology

関連論文

• Spin Correlation Functions in the Large-α Region of the Square-Lattice J_1-J_2 Model (General)
• Kinematical Interaction between S=1/2 Spins in the Two-time Spin Green's Function Method : General Physics
• Spin-Wave Theory of the Triangular-Lattice Heisenberg Antiferromagnet
• Green's Function Approach to the Modified Quantum Heisenberg Model
• Spin-Wave Theory of the Square-Lattice Heisenberg Antiferromagnet
• Spin-Wave Theory of Modified Quantum Heisenberg Model
• Roton-Like Excitation in Quantum Lattice Model

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