Quantum Phase Transition of Two-Dimensional Diluted Heisenberg Antiferromagnet
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概要
- 論文の詳細を見る
Quantum phase transition of site-diluted and bond-diluted Heisenberg antiferromagnets on square lattices is studied. By using the novel continuous-time loop algorithm, we perform quantum Monte Carlo simulations on quite larger lattices at extremely lower temperatures than the previous numerical studies. It is found that the antiferromagnetic long-range order at T = 0 persists so long as a cluster of magnetic sites percolates, that is, the critical concentration is equal to the classical percolation threshold, in both of the site-diluted and bond-diluted cases. Furthermore, we find that some critical exponents, such as the magnetization exponent β, are non-classical and strongly depend on the spin size S. On the other hand, we show that the correlation-length exponent ν is universal and is equal to the classical value (ν=4/3).
- 理論物理学刊行会の論文
- 2000-04-28
著者
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MIYASHITA Seiji
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo
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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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川島 直輝
Department Of Physics Tokyo Metropolitan University
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Harada Kenji
Department Of Cardiology Nagoya University Graduate School Of Medicine
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Harada Kenji
Department Of Computer Science Kitami Institute Of Technology
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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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KATO Kiyoshi
Institute for Solid State Physics, University of Tokyo
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KAWASHIMA Naoki
Department of Physics, Tokyo Metropolitan University
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Takayama Hajime
Institute For Solid State Physics University Of Tokyo
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Miyashita S
Univ. Tokyo Tokyo Jpn
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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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Miyashita Seiji
Department Of Physics University Of Tokyo
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Miyashita S
Department Of Applied Physics University Of Tokyo
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Kawashima Naoki
Department Of Physics Toho University
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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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Miyashita Seiji
Graduate School Of Human And Environmental Studies Kyoto University
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Hirata K
Deep Sea Research Department Japan Marine Science And Technology Center
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Harada K
Seismology And Volcanology Research Department Meteorological Research Institute
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Harada Kenji
Department Of Cardiology Chubu-rosai Hospital
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Hirata Kenji
Deep Sea Research Department Japan Marine Science And Technology Center
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Miyashita Seiji
Department Of Applied Physics University Of Tokyo
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Kawashima Naoki
Department Of Physics Faculty Of Science 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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Harada Kenji
Department Of Applied Analysis And Complex Dynamical Systems Kyoto University
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Miyashita Seiji
Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo
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Kato Kiyoshi
Institute For Cosmic Ray Research University Of Tokyo
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Hirata Kenji
Seismology And Volcanology Research Division Meteorological Research Institute
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Miyashita Seiji
Crest Jst
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MIYASHITA Seiji
Department of Applied Physics, University of Tokyo
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MIYASHITA Seiji
Department of Applied Physics, School of Engineering, University of Tokyo
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MIYASHITA Seiji
Department of Physics, School of Science, The University of Tokyo
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MIYASHITA Seiji
Faculty of Integrated Human Studies, Kyoto 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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