Ground State of S = 1 Heisenberg Ladders
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概要
- 論文の詳細を見る
The ground state of S = 1 antiferromagnetic Heisenberg (AFH) two-leg ladder has been shown to be gapful, in a whole range from the weak rung coupling limit to the strong rung coupling limit. The well-known valence-bond solid (VBS) picture for single AFH chains does not hold for this disordered ground state. We generalize the VBS picture to the plaquette-singlet solid (PSS) one to obtain a good description of the S = 1 ladder. The validity of the PSS picture for this system is also supported by the finiteness of a newly-introduced hidden order parameter analogous to the string order parameter. We observe that there is also no critical point in the ground state of ladders with in-phase leg-bond alternation.
- 理論物理学刊行会の論文
- 2002-06-28
著者
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Takayama H
Univ. Tokyo Kashiwa Jpn
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TAKAYAMA Hajime
Institute for Solid State Physics, University of Tokyo
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TAKAYAMA Hajime
The Institute for Solid State Physics, The University of Tokyo
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YASUDA Chitoshi
Institute for Solid State Physics, University of Tokyo
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TODO Synge
Institute for Solid State Physics, University of Tokyo
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MATSUMOTO Munehisa
Institute for Solid State Physics, University of Tokyo
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Takayama Hajime
Institute For Solid State Physics University Of Tokyo
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Todo Synge
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Agency
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Todo Synge
Institute For Solid State Physics University Of Tokyo
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Yasuda Chitoshi
Department Of Physics And Mathematics Aoyama Gakuin University
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Yasuda C
Sci. Univ. Tokyo Chiba
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Matsumoto Munehisa
Institute For Solid State Physics University Of Tokyo
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Takayama Hajime
Institute For Solid State Physics The University Of Tokyo
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Takayama Hajime
Department Of Physics Faculty Of Science Hokkaido University
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TAKAYAMA Hajime
Research Institute for Fundamental Phisics, Kyoto University
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TODO Synge
Institute for Solid State Physics, University of Tokyo:Theoretische Physik, Eidgenossische Technische Hochschule
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