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研究生: 陳凱榆
論文名稱: 奈米碳管分子結間電子傳輸與干涉現象之第一原理研究
An ab initio Study on the Interference Phenomenon in the Transmission of the CNT-molecule-CNT Junctions
指導教授: 陳穎叡
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2013
畢業學年度: 101
語文別: 英文
論文頁數: 32
中文關鍵詞: 第一原理奈米碳管電子傳輸干涉分子結密度泛函理論
英文關鍵詞: ab initio, carbon nanotube, transmission, interference, molecular junction, DFT
論文種類: 學術論文
相關次數: 點閱:244下載:10
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  • 本篇論文以奈米碳管(Carbon Nanotube, CNT)與分子結構所形成的一維系統為題,利用第一原理(Ab initio)方法計算其傳輸性質;依據分子結構的不同,發現會有干涉現象的產生。藉由與緊束縛模型(Tight Binding model)所得的結果相互比對,透過傳輸係數(Transmission Coefficients)及態密度(Density of States, DOS)的分析,可歸納出影響類似此種結構之奈米電子元件的電子傳輸性質為何,並且進一步地了解量子傳輸理論(Quantum Transport Theory)。

    Index Introduction. 1 Theory and model. 3 (I) The Density Functional Theory (DFT). 4 (II) DFT in Nanodcal. 4 (III) Non-equilibrium Green’s function (NEGF). 5 (IV) Boundary condition as the self-consistent field criteria in Nanodcal. 6 (V) NEGF in Nanodcal. 7 Method. 11 Results and Discussion. 13 (I) Transmission function. 13 (II) Density of states. 25 Conclusions. 29 Appendix. 30 References. 32

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