First principle study of edge topological defect-modulated electronic and magnetic properties in zigzag graphene nanoribbons

Zigzag graphene nanoribbon （ZGNR） is a promising candidate for next-generation spintronic devices. Development of the field requires potential systems with variable and adjustable electromagnetic properties. Here we show a detailed investigation of ZGNR decorated with edge topological defects （ED-ZG...

Full description

Saved in:
Bibliographic Details
Published inChinese physics B Vol. 26; no. 10; pp. 169 - 174
Main Author 黄露婷 陈铮 王永欣 卢艳丽
Format Journal Article
LanguageEnglish
Published 01.10.2017
Subjects
拓扑缺陷
石墨
磁性
第一性原理
纳米带
自旋电子器件
调制
锯齿型
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/26/10/103103

Cover

More Information
Summary:Zigzag graphene nanoribbon （ZGNR） is a promising candidate for next-generation spintronic devices. Development of the field requires potential systems with variable and adjustable electromagnetic properties. Here we show a detailed investigation of ZGNR decorated with edge topological defects （ED-ZGNR） synthesized in laboratory by Ruffieux in 2015 [Pascal Ruffieux, Shiyong Wang, Bo Yang, et al. 2015 Nature 531 489]. The pristine ED-ZGNR in the ground state is an antiferromagnetic semiconductor, and the acquired band structure is significantly changed compared with that of perfect ZGNR. After doping heteroatoms on the edge, the breaking of degeneration of band structure makes the doped ribbon a half-semi-metal, and nonzero magnetic moments are induced. Our results indicate the tunable electronic and magnetic properties of ZGNR by deriving unique edge state from topological defect, which opens a new route to practical nano devices based on ZGNR.
Bibliography:Zigzag graphene nanoribbon （ZGNR） is a promising candidate for next-generation spintronic devices. Development of the field requires potential systems with variable and adjustable electromagnetic properties. Here we show a detailed investigation of ZGNR decorated with edge topological defects （ED-ZGNR） synthesized in laboratory by Ruffieux in 2015 [Pascal Ruffieux, Shiyong Wang, Bo Yang, et al. 2015 Nature 531 489]. The pristine ED-ZGNR in the ground state is an antiferromagnetic semiconductor, and the acquired band structure is significantly changed compared with that of perfect ZGNR. After doping heteroatoms on the edge, the breaking of degeneration of band structure makes the doped ribbon a half-semi-metal, and nonzero magnetic moments are induced. Our results indicate the tunable electronic and magnetic properties of ZGNR by deriving unique edge state from topological defect, which opens a new route to practical nano devices based on ZGNR.
Lu-Ting Huang, Zheng Chen, Yong-Xin Wang, Yan-Li Lu（ State Key Laboratory of Solidification Processing, School of Materials Science and Engineering Northwestern Polytechnical University, Xi＇ an 710072, China）
11-5639/O4
graphene nanoribbons, topological defect, spin, edge
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/10/103103