English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62568/95224 (66%)
Visitors : 2528797      Online Users : 39
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/79933

    Title: The effect of local lattice distortion on physical properties of hexagonal rubidium tungsten bronze Rb0.23WOy
    Authors: Ling, D. C.;Shao, Y. C.;Chiou, J. W.;Pong, W. F.;Wu,, S. H.;Chen, Y. Y.;Chien, F. Z.
    Contributors: 淡江大學物理學系
    Date: 2009-03-31
    Issue Date: 2013-01-15 18:05:20 (UTC+8)
    Publisher: Bristol: Institute of Physics
    Abstract: Superconducting transition temperature Tc and normal-state resistivity as a function of oxygen content for hexagonal tungsten bronze Rb0.23WOy with 2.90 < y < 3.05 were obtained from transport measurements. It is remarkably interesting that Tc enhances about 50% and room-temperature resistivity increases about three orders of magnitude as oxygen content varies from 2.90 to 3.05. The low-temperature specific heat data indicate that the Einstein-like mode associated with Rb vibration has a dimensionality crossover from 3D to quasi-2D as oxygen content increases from 2.90 to 3.05. W L3-edge x-ray absorption spectra further show that W-O bond intensity gradually weakens as oxygen content increases, indicative of more oxygen disorder present in the oxygen-rich samples. The observed results strongly suggest that the local lattice distortion induced by oxygen disorder not only modulates Rb vibration, possibly coupled to electron-phonon interaction responsible for superconductivity, and also reduces the charge transfer between O 2p and W 5d orbital in the vicinity of y = 3.00. This scenario can possibly account for significant increases of Tc and normal-state resistivity of Rb0.23WOy as oxygen content slightly changes from 2.90 to 3.05.
    Relation: Journal of Physics: Conference Series(JPCS) 150, 052141
    DOI: 10.1088/1742-6596/150/5/052141
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

    Files in This Item:

    File Description SizeFormat
    1742-6596_150p052141.pdf469KbAdobe PDF282View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback