Order Parameter in Quantum Antiferromagnets
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概要
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We discuss the nature of symmetry breaking in quantum antiferromagnets. Weshow that published arguments concerning the order parameter for the 2d .s'= 1 / 2Heisenberg antiferromagnet have to be reconsidered. These had led to 8 and 1 forthe ratio r of the mean z-component m of the staggered spin per particle m', in an infinitesimal staggered field B, to the r.m.s. value m. of m: with B=O, in the ther-modynamic limit. We give arguments which put doubt on both values. Also we prover 1 l, given 7770 : 0.
- 社団法人日本物理学会の論文
- 1989-11-15
著者
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HORSCH P.
Max-Planck Institut
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W.von Der
Ibm Research Labs.
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P. Horsch
Max-planck-inst. Fur Festkorperforschung
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T.A. KAPLAN
Dept.of Physics,and Astronomy and Center for Fundamental Mat'ls Res.,Michigan State Univ.
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T.a. Kaplan
Dept.of Physics And Astronomy And Center For Fundamental Mat'ls Res. Michigan State Univ.:max-p
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Kaplan T.A.
Dept.of Physics,and Astronomy and Center for Fundamental Mat'ls Res.,Michigan State Univ.
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Linden W.von
IBM Research Labs.