2004年英國曼徹斯特大學Andre Geim及Konstantin Novoselov將利用膠帶從高定向熱裂解石墨(HOPG)分離出單原子的石墨烯，證實了二維材料可穩定單獨存，吸引了眾多科學家投入二維材料的研究。2009年，Ruoff團隊發展出利用銅作為催化劑成長石墨烯之後，以化學氣相沉積法成長石墨烯的技術已漸漸成熟，可以合成大面積與高品質的石墨烯供應科學上的研究或工業上的應用。在層數為雙層以上石墨烯其能帶結構會受到碳原子堆疊情形的影響而發生改變，然而大部份以化學氣相沉積法製備出的石墨烯大多為多晶，因此不利於科學上進行定性的分析。本論文同樣利用銅基板當作催化劑，透過精準調控成長參數，成功地合成出單晶雙層與三層石墨烯，並利用拉曼光譜與穿透式電子顯微鏡分析與判斷石墨烯層層間的堆疊情形。
在狄拉克點附近對稱且線性的電子能帶結構，使石墨烯擁有獨特的電子與電洞對稱性。在旋轉堆疊雙層石墨烯中，由於兩層石墨烯之間的強交互作用力，使得導電帶與價電帶出現如馬鞍狀能帶區，光激發電子與聲子可在此產生強烈的共振散射。本論文藉由對旋轉堆疊雙層石墨烯施加一閘極偏壓，使上下層石墨烯感應出不同濃度的載子，造成能帶結構對稱性的改變，使共振散射消失。從拉曼光譜的變化，我們可以了解給予雙層石墨烯不等電位下之電聲子交互作用關係，於光電子元件應用的前瞻研究有很大的貢獻。

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