Green's Function Approach to the Modified Quantum Heisenberg Model

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概要

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• The txvo-time Green's ftrnctiora taaethod is applied to the naodified qtranttrtm Heisenberg unodelwith tlae following exchange interactions: The interactions decay as inverse square of the distancebetween sites ?ttad have alternate positive and negative signs with increasing distance betweensites; taaoreover, tlaey work xvell only along tlae coordinate axes. Tl're critical temperature andzero-tenaperattrre spin reduction are calctrlated for tlae orae-, two- and three-ditauensiotaal cases.The tenaperattrre dependetace of spin redttctions in two and tlaree ditnensions is estinaated inthe low-tenaperattrre region. The critical belaavior of lorag-range order and strsceptibility is alsoinvestigated. Lastly, it is atteraapted to estimate tlte long-distance behavior of static correl?ttionftrnction in one diznension.

• 社団法人日本物理学会の論文
• 1998-11-15

著者

• AOKI Tosizumi

  Gunma National College of Technology

• Aoki Tosizumi

  Gunma College Of Technology

• Aoki Toshizumi

  Gunma College Of Technology

• Aoki Toshizumi

  Gunma National 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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