English  |  正體中文  |  简体中文  |  Items with full text/Total items : 25398/25993 (98%)
Visitors : 6189860      Online Users : 35
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU 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: http://ir.lib.ksu.edu.tw/handle/987654321/3812

    Title: Electronic and optical properties of a nanographite ribbon in an electric field
    Authors: ChangC.P.
    LiT.S. (李道聖)
    Keywords: Graphite
    Electronic properties
    Date: 2005-09-30
    Issue Date: 2009-08-15 19:49:52 (UTC+8)
    Abstract: Through the tight-binding model, the effect of electric field on electronic and optical properties of a zigzag (an armchair) H-terminatednanographite ribbon is studied. The effective electric field shifts the Fermi level (EF), modifies the energy dispersions, alters the subbandspacing, produces the new edge state, changes the band gap, and causes the semiconductor–metal transitions. First, in the metallic zigzagribbon, the degeneracy of flat bands at EF is lifted by the electric field. Meanwhile, an energy band gap Eg, depending on the ribbon widthand the field strength, is induced. And while the field strength increases, the semiconductor–metal transition occurs in both the semiconductingarmchair and the zigzag ribbons. Then, the effect of electric field on band structures is completely reffected in the features ofdensity of states—the shift of peak position, the change of peak height and the alternation of band gap. Most importantly, the effectiveelectric field has great influence on the low-energy absorption spectra. It can change frequency of the first peak, alter the peak height, andeven produce the new peaks.
    Relation: Carbon, v. 44, 2006, p. 508-515
    Appears in Collections:[電機工程系所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    Electronic and optical properties.pdf583KbAdobe PDF0View/Open

    All items in KSUIR are protected by copyright, with all rights reserved.

    ©Kun Shan University Library and Information Center
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback