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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27589


    Title: Quantum phase transition in double triangular layer
    Authors: Shik, H. Y.;陳惟堯;Chen, Wei-yeu;Lin, Hai-qing
    Contributors: 淡江大學物理學系
    Keywords: Dimerized state;Quantum phase transition;Soluble quantum spin model
    Date: 2004-05-01
    Issue Date: 2009-12-31 10:27:52 (UTC+8)
    Publisher: Elsevier
    Abstract: We study a quantum spin model defined on a double triangular layer whose ground state and the first few excited states could be rigorously obtained for any spin S. There exist two kinds of ground state, one is a complete dimerized state, and the other one is the ground state of corresponding spin-2S model defined on the single triangular layer. Quantum phase transition points are determined by the spin-wave theory and verified by exact diagonalization study of finite clusters. The excitation spectrum is investigated and we found that there exists a singlet to singlet transition as well as triplet to singlet transition as parameters vary.
    Relation: Journal of Magnetism and Magnetic Materials 272-276(1), pp.203-204
    DOI: 10.1016/j.jmmm.2003.12.1039
    Appears in Collections:[物理學系暨研究所] 期刊論文

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