淡江大學機構典藏:Item 987654321/54070
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 64178/96951 (66%)
造访人次 : 9369652      在线人数 : 14331
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/54070


    题名: 低維度系統激子行為之第一原理研究
    其它题名: Ab-initio study on exciton in low-dimensional systems
    作者: 歐上銘;Ou, Shang-Ming
    贡献者: 淡江大學物理學系碩士班
    薛宏中;Hsueh, Hung-Chung
    关键词: 激子;二維單層片狀結構碳化矽;二維單層片狀結構氮化硼;Wannier函數;BSE;雙粒子核心動能;關聯函數;exciton;SiC sheet;BN sheet;Wannier function;BSE;two-particle kinetic kernel;correlation function
    日期: 2011
    上传时间: 2011-06-16 21:56:51 (UTC+8)
    摘要: 本研究由第一原理出發,以局域化之Wannier函數為基底,描述強束縛激子的波函數。接著利用雙粒子動能核心的構想,透過求解 Bethe-Salpeter Equation (BSE),得到激子之關聯函數與響應函數,進而可與非彈性光散射實驗比較,以了解強束縛激子的動態傳播特性。我們主要模擬二維單層片狀結構的碳化矽與氮化硼,其強束縛激子的動態行為。此外,由本研究之結果發現,當維度增加時,結構由單層片狀結構,變為雙層片狀結構時,而原本強束縛的激子將不再受限於只能在平面上傳播。
    In this thesis ,we perform first-principles calculations to explore the properties strongly bound Frenkel-like excitons. According to the local character ,the wavefunction of Frenkel-like exciton can be represented by the Wannier function in our study. Furthermore ,electronic correlation function and response function can be obtained by solving the Bethe-Salpeter equation with the help of developing two-particle kinetic kernel(T). Our result can be compared with the measurement of inelastic X-ray scattering. Practically ,we focus on the dynamical properties of strongly bound exciton in two-dimensional SiC sheet and BN sheet. Meanwhile ,our results show that exciton could be propagated along the direction perpendicular to the sheet plane by reducing the inter-sheet distance.
    显示于类别:[物理學系暨研究所] 學位論文

    文件中的档案:

    档案 大小格式浏览次数
    index.html0KbHTML331检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

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