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Modulation of magnetic and electrical properties of bilayer graphene quantum dots using rotational stacking faults

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【Author】 Hong-Ping Yang;Wen-Juan Yuan;Jun Luo;Jing Zhu;National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, the State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials(MOE), Tsinghua University;Center for Electron Microscopy, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering,Tianjin University of Technology;

【通讯作者】原文娟;朱静;

【机构】 National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, the State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials(MOE), Tsinghua University； Center for Electron Microscopy, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering,Tianjin University of Technology；

【摘要】 Bilayer graphene quantum dots with rotational stacking faults(RSFs) having different rotational angles were studied.Using the first-principles calculation, we determined that these stacking faults could quantitatively modulate the magnetism and the distribution of spin and energy levels in the electronic structures of the dots.In addition, by examining the spatial distribution of unpaired spins and Bader charge analysis, we found that the main source of magnetic moment originated from the edge atoms of the quantum dots.Our research results can potentially provide a new path for producing all-carbon nanodevices with different electrical and magnetic properties.更多还原

【Abstract】 Bilayer graphene quantum dots with rotational stacking faults(RSFs) having different rotational angles were studied.Using the first-principles calculation, we determined that these stacking faults could quantitatively modulate the magnetism and the distribution of spin and energy levels in the electronic structures of the dots.In addition, by examining the spatial distribution of unpaired spins and Bader charge analysis, we found that the main source of magnetic moment originated from the edge atoms of the quantum dots.Our research results can potentially provide a new path for producing all-carbon nanodevices with different electrical and magnetic properties.更多还原

【关键词】 bilayer graphene quantum dots； rotational stacking faults； first-principles calculation；
【Key words】 bilayer graphene quantum dots； rotational stacking faults； first-principles calculation；

【基金】 Project supported by the National Natural Science Foundation of China(Grant Nos.11374174,51390471,51527803,and 51701143);the National Basic Research Program of China(Grant No.2015CB654902);the National Key Research and Development Program of China(Grant No.2016YFB0700402);the Foundation for the Author of National Excellent Doctoral Dissertation,China(Grant No.201141);the Tianjin Municipal Education Commission,China;the Tianjin Municipal Science and Technology Commission,China;the Fundamental Research Fund of Tianjin University of Technology

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2019年07期

【分类号】TQ127.11;TB383.1
【被引频次】2
【下载频次】19

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