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    题名: X-ray multiple-wave coherent interaction in a quasi-two-dimensional material NbSe2-2H
    作者: Du, Chao-hung;Tang, Mau-tsu;Stetsko, Yuri P
    贡献者: 淡江大學物理學系
    关键词: X-ray multiple-wave;modulated structure;incommensurate modulation;charge-density wave;electron-density distribution
    日期: 2004-05
    上传时间: 2009-12-31 10:08:56 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: The first observation of the X-ray multiple-wave interaction in an incommensurate charge-density-wave (CDW) modulated structure at low temperatures is reported for an example of a quasi-two-dimensional material, NbSe2-2H. Via the coherent interaction between the X-ray waves propagating in the CDW-modulated structure and the host structure, the phase-dependent intensity variations of a CDW reflection were detected. In accord with a centrosymmetric structure, the phases of the structure-factor triplets of two CDW reflections and a Bragg reflection of the host structure were determined to be either 0 or 180°, and not to vary with temperature. Relative phase differences of the two CDW reflections are also deduced.
    關聯: Acta Crystallographica Section A 60(3), pp.209-213
    DOI: 10.1107/S0108767304004714
    显示于类别:[物理學系暨研究所] 期刊論文

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