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

doi:10.1088/1674-1056/28/7/078106

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.

Keywords: bilayer graphene quantum dots rotational stacking faults first-principles calculation

Received: 24 February 2019
Revised: 26 April 2019
Accepted manuscript online:

PACS:	81.05.ub	(Fullerenes and related materials)
	81.05.ue	(Graphene)
	31.15.E	(Density-functional theory)

Fund:

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, and the Fundamental Research Fund of Tianjin University of Technology. This work made use of the resources of the National Center for Electron Microscopy in Beijing and Tsinghua National Laboratory for Information Science and Technology.

Corresponding Authors: Wen-Juan Yuan, Jing Zhu
E-mail: yuanwj@email.tjut.edu.cn;jzhu@mail.tsinghua.edu.cn

Cite this article:

Hong-Ping Yang(杨宏平), Wen-Juan Yuan(原文娟), Jun Luo(罗俊), Jing Zhu(朱静) Modulation of magnetic and electrical properties of bilayer graphene quantum dots using rotational stacking faults 2019 Chin. Phys. B 28 078106

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

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