Modified Spin Wave Theory of the Bilayer Square Lattice Frustrated Quantum Heisenberg Antiferromagnet
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概要
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The ground state of the square lattice bilayer quantum antiferromagnet with nearest and next-nearest neighbour intralayer interaction is studied by means of the modified spin wave method.Far weak interlayer coupling, the ground state is found to be always magnetically ordered whilethe quantum disordered phase appear for large enough interlayer coupling. The properties ofthe disordered phase vary according to the strength of the frustration. In the regime of weakfrustration, the disordered ground state is an almost uncorrelated assembly of interlayer dimers,while in the strongly frustrated regime the quantum spin liquid phase which has considerableNeel type short range order appears. The behavior of the sublattice magnetization and spin-spincorrelation length in each phase is discussed.
- 社団法人日本物理学会の論文
- 1996-02-15
著者
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Hida K
Saitama Univ. Saitama
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Hida Kazuo
Department Of Physics Faculty Of Science Saitama University
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Hida Kazuo
Department Of Engineering Science Faculty Of Engineering Hokkaido University
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HIDA Kazuo
Department of Physics, Saitama University
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HIDA Kazuo
Department of Physics, University of Tokyo
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