十字形石墨烯纳米结的电子输运特性

doi:10.3969/j.issn.1001-2400.2017.05.015

西安电子科技大学学报

十字形石墨烯纳米结的电子输运特性

娄利飞;王东洋;潘青彪;张军琴

(西安电子科技大学微电子学院，陕西西安 710071)

收稿日期:2016-10-10 出版日期:2017-10-20 发布日期:2017-11-29
作者简介:娄利飞(1977-)，女，副教授，博士，E-mail: loulifei@mail.xidian.edu.cn
基金资助:
国家自然科学基金重点资助项目(61334033)；国家自然科学基金资助项目(61474089)；中央高校基本科研业务费专项资金资助项目(K5051225011)

Electronic transport properties of cross graphene nano-junction

LOU Lifei;WANG Dongyang;PAN Qingbiao;ZHANG Junqin

(School of Microelectronics, Xidian Univ., Xi'an 710071, China)

Received:2016-10-10 Online:2017-10-20 Published:2017-11-29

摘要/Abstract

摘要：

石墨烯纳米带具有特殊的电学特性，可通过控制其几何构型或掺杂来调节其电子输运性能．文中利用两种不同手性石墨烯纳米带表现出来的金属性与半导体性构建了十字形异质结结构，结合密度泛函理论与非平衡格林函数的模型理论计算方法，研究了结的高度和宽度、杂质掺杂及掺杂位置对十字形石墨烯异质结结构电子输运特性的影响．研究结果表明，随着臂宽和臂高的增加，石墨烯十字形异质纳米结表现出一定的金属性，但透射系数谱线中出现了明显的振荡现象，并且由于氮原子的掺入加剧了电子的散射，使得电子输运性能降低，其中掺杂在两臂的电子输运性能相较于主干掺杂的情况降低更多．

关键词: 石墨烯纳米带, 十字形异质结构, 密度泛函理论, 非平衡格林函数, 电子输运特性

Abstract:

Graphene nanoribbons have special electrical properties, The electron transport properties can be regulated by controlling their geometry or doping. The metallic properties and semiconductor properties of different chiral graphene nanoribbons are used to build the cross graphene nano-junction in this paper. The method of density functional theory and non-equilibrium Green's function are used to research electronic transport properties of the graphene nano-junction with different heights and widths and locations of doping. It is shown that the graphene nano-junction shows metallic properties with increase in height and width of the arm. But the transmission spectral line has a clear oscillation. Since the doped nitrogen atom intensifies electron scattering, the electronic transport properties decrease. And the electron transport properties when the two arms are doped worsens more compared to the case of trunk doping.

Key words: graphene nanoribbon, cross heterojunction nanostructure, density functional theory, non-equilibrium Green's function, electronic transport propertie

娄利飞;王东洋;潘青彪;张军琴. 十字形石墨烯纳米结的电子输运特性[J]. 西安电子科技大学学报, 2017, 44(5): 87-91+120.

LOU Lifei;WANG Dongyang;PAN Qingbiao;ZHANG Junqin. Electronic transport properties of cross graphene nano-junction[J]. Journal of Xidian University, 2017, 44(5): 87-91+120.

参考文献

［1］王鼎, 张振华, 邓小清, 等. BN链掺杂的石墨烯纳米带的电学及磁学特性［J］. 物理学报, 2013, 62(20): 207101.
WANG Ding, ZHANG Zhenhua, DENG Xiaoqing, et al. Electrical and Magnetic Properties of Graphene Nanoribbons with BN-chain Doping［J］. Acta Physica Sinica, 2013, 62(20): 207101.
［2］娄利飞, 潘青彪, 张军琴, 等. 石墨烯/碳纳米管三维结构的电子输运特性［J］. 西安电子科技大学学报, 2016, 43(3): 85-89.
LOU Lifei, PAN Qingbiao, ZHANG Junqin, et al. Research on the Electronic Transport Characteristics of the Three-dimensional Graphene/carbon Nanotube Composite Structure［J］. Journal of Xidian University, 2016, 43(3): 85-89.
［3］ JING Y H, WU G X, GUO L C, et al. Electronic Transport Properties of Graphyne and Its Family［J］. Computational Materials Science, 2013, 78: 22-28.
［4］ ZHOU Y H, WU J J, HE P, et al. The Electronic Transport Properties in Boron-doped Armchair Graphene Nanoribbon Junctions［J］. Nanoscience and Nanotechnology Letters, 2015, 7(8): 630-636.
［5］ LIU W, CHENG J, ZHAO J H, et al. Electronic Transport through a Graphene Nanoribbon Composed of Nanoribbons of Different Widths［J］. Journal of Modern Physics, 2015, 6(2): 95-100. ［6］ CHAUHAN S S, SRIVASTAVA P, SHRIVASTAVA A K. Electronic and Transport Properties of Boron and Nitrogen Doped Graphene Nanoribbons: an Ab Initio Approach［J］. Applied Nanoscience, 2014, 4(4): 461-467.
［7］ LIU J, ZHANG Z H, DENG X Q, et al. Electronic Structures and Transport Properties of Armchair Graphene Nanoribbons by Ordered Doping［J］. Organic Electronics: Physics, Materials, Applications, 2015, 18: 135-142.
［8］ NAZARI A, FAEZ R, SHAMLOO H. Modeling Comparison of Graphene Nanoribbon Field Effect Transistors with Single Vacancy Defect［J］. Superlattices and Microstructures, 2016, 97: 28-45.
［9］ FAHAD M S, SRIVASTAVA A, SHARMA A K, et al. Analytical Current Transport Modeling of Graphene Nanoribbon Tunnel Field-effect Transistors for Digital Circuit Design［J］. IEEE Transactions on Nanotechnology, 2016, 15(1): 39-50.
［10］ PRICE M D S, CRUZ-SILVA E, COSTA A L M T, et al. Electronic and Transport Properties of Graphene Nanoribbon Barbell-shaped Heterojunctions［J］. Physica Status Solidi B-Basic Solid State Physics, 2013, 250(11): 2417-2423.
［11］ ZHANG X J, CHEN K Q, TANG L M, et al. Electronic Transport Properties on V-shaped-notched Zigzag Graphene Nanoribbons Junctions［J］. Physics Letters A, 2011, 375(37): 3319-3324.
［12］ LI Y, JALIL M B A, ZHOU G H. Giant Magnetoresistance Modulated by Magnetic Field in Graphene P-n Junction［J］. Applied Physics Letters, 2014, 105(19): 193108.
［13］ WANG Y, CAO C, CHENG H P. Metal-terminated Graphene Nanoribbons［J］. Physical Review B, 2010, 82(20): 205429.
［14］ ZENG J, CHEN K Q, SUN C Q. Electronic Structures and Transport Properties of Fluorinated Boron Nitride Nanoribbons［J］. Physical Chemistry Chemical Physics, 2012, 14(22): 8032-8037.
［15］ HAN M Y, OZYILMAZ B, ZHANG Y, et al. Energy Band-gap Engineering of Graphene Nanoribbons［J］. Physical Review Letters, 2007, 98(20): 206805.

[1]	娄利飞;潘青彪;张军琴;周晓乐. 石墨烯/碳纳米管三维结构的电子输运特性[J]. 西安电子科技大学学报, 2016, 43(3): 85-89.
[2]	刘红霞;宋久旭;张鹤鸣. (4,4)碳纳米管/碳化硅纳米管异质结的输运特性[J]. J4, 2010, 37(3): 520-523.

十字形石墨烯纳米结的电子输运特性

Electronic transport properties of cross graphene nano-junction

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