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研究生: 廖浩鈞
Liao, Hao-Chun
論文名稱: MoS2奈米緞帶與金屬接觸研究
Study on the Contact Between MoS2 Nanoribbons and Metal
指導教授: 楊志開
口試委員: 鄭舜仁
許琇娟
學位類別: 碩士
Master
系所名稱: 理學院 - 應用物理研究所
Graduate Institute of Applied Physics
論文出版年: 2026
畢業學年度: 114
語文別: 中文
論文頁數: 134
中文關鍵詞: 二硫化鉬奈米帶過渡金屬
外文關鍵詞: MoS2, nanoribbon, transition metal
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  • 二硫化鉬廣泛運用在半導體業中產業中,結構由數層六角形平面堆疊所形成。若能將整體結構切割成只有兩層的奈米帶(ribbon),兩側邊緣為扶手椅狀(armchair),長度一長一短在中間形成階梯排列,共有AB、AA兩種類型,經由第一原理密度泛函計算能帶顯示為半導體。
    經過在不同位置放上過渡金屬原子測試,得出在中央階梯處吸附力最強,甚至可以把外來原子吸入雙層中間。於是在中央分別摻雜數種不同過度金屬,並且逐步增加原子數量,來模擬半導體產業中進行半導體封裝時與金屬的接面。
    結果發現隨著添加的原子數增多,能帶也開始出現導電性,解決了蕭特基勢壘(Schottky barrier)問題。某些種類的元素置入時,能帶甚至出現自旋極化現象。本研究也觀察了磁性上的變化。


    MoS₂ is widely used in the semiconductor industry, with its structure consisting of multiple stacked hexagonal layers. If the bulk structure is tailored into a two-layer nanoribbon with one layer longer than the other, a stepped surface is formed. Two stacking types, AB and AA for the nanoribbon with armchair edges, are considered, and first-principles density functional calculations reveal that both configurations exhibit semiconducting band structures.
    By introducing various transition metals at different adsorption sites, calculations also show that the strongest binding occurs at the central region close to the step, where foreign atoms can even be absorbed between the two layers.Subsequently, different types of transition metals are doped at the region, with the number of atoms gradually increased to simulate the metal–semiconductor interfaces that arises
    during semiconductor packaging processes.
    The results show that as the number of adatoms increases,the system begins to exhibit metallic conductivity, effectively resolving the Schottky-barrier problem. In certain cases, spin-polarized states appear in the band structure, and variations in magnetic properties are also observed in this study.

    致謝 2
    摘要 3
    Abstract 4
    第一章 緒論 16
    第二章 研究方法 19
    第三章 MoS2緞帶 22
    第四章 加上Ti 39
    四-1 單一Ti原子與step的吸附 39
    四-1 與多顆Ti的摻雜 40
    四-1-1 一顆Ti 41
    四-1-2 二顆Ti 45
    四-1-3 三顆Ti 49
    四-1-4 四顆Ti 53
    四-1-5 五顆Ti 57
    四-1-6 六顆Ti 61
    四-1-7 七顆Ti 65
    四-1-8 八顆Ti 69
    四-1-9 九顆Ti 73
    四-1-10 十顆Ti 78
    第五章 Cu&Fe 83
    五-1 結合能比較 83
    五-2 半導體類 85
    五-2-1 AB結構與二顆Cu原子 85
    五-2-2 AA結構與二顆Cu原子 87
    五-3 導體 89
    五-3-1 AA結構與八顆Cu原子 89
    五-3-2 AA結構與七顆Fe原子 93
    五-4 自旋極化 95
    五-4-1 AB結構與一顆Cu原子 95
    五-4-2 AA結構與一顆Cu原子 97
    第六章 加上Al&Au 105
    六-1 結合能比較 105
    六-2 半導體 107
    六-2-1 AB結構與一顆Al原子 107
    六-2-2 AA結構與一顆Al原子 109
    六-2-3 AB結構與一顆Au原子 111
    六-2-4 AA結構與二顆Au原子 113
    六-3 導體 115
    六-3-1 AB結構與八顆Cu原子 115
    六-3-2 AA結構與八顆Al原子 117
    六-3-3 AB結構與八顆Au原子 120
    六-3-4 AA結構與八顆Au原子 122
    六-4 自旋極化 124
    六-4-1 AB結構與四顆Al原子 124
    六-4-2 AB結構與五顆Al原子 126
    六-4-3 AB結構與七顆Al原子 128
    第七章 結論 131
    引文 133

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