Magnetization Process of S=1/2 XXZ Chain in a Periodic Magnetic Field : Condensed Matter: Electronic Properties, etc.
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概要
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The magnetization process of S = 1/2 XXZ chain, exposed to a periodic field, have been studied with use of density matrix renormalization group (DMRG) method and Jordan-Wigner fermion mean field approximation. In this study, the DMRG calculation has been performed mainly in case of periodic field with a period four times the lattice spacing. The magnetization curves for various values of Ising anisotropy Δ and amplitude of periodic field λ are obtained, exhibiting a plateau for a suitable set of values of Δ and λ. A phase diagram on the plane of Δ and the uniform field h, or on the plane of Δ and λ, has been constructed to show the condition for the 'plateau phase' to appear. These results are well interpreted in terms of the renormalized energy band of JW-fermions, moving in a self-consistent periodic field.
- 社団法人日本物理学会の論文
- 2000-12-15
著者
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Ishii Chikara
Department Of Physics Faculty Of Science Science University Of Tokyo
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Yamamoto Takahiro
Department Of Materials Engineering The University Of Tokyo
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Asano Masanari
Department Of Physics Faculty Of Science Science University Of Tokyo
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ISHI Chikara
Department of Physics, Faculty of Science, Science University of Tokyo
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Yamamoto Takahiro
Department Of Bioscience And Biotechnology Okayama University
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Ishi Chikara
Department Of Physics Faculty Of Science Science University Of Tokyo
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Yamamoto Takahiro
Department Of Physics Faculty Of Science Science University Of Tokyo
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