|Table of Contents|

Study of Edge States in Zigzag Graphene Nanoribbon(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2018年01期
Page:
42-
Research Field:
·物理学·
Publishing date:

Info

Title:
Study of Edge States in Zigzag Graphene Nanoribbon
Author(s):
Hu Bian; Liu Na; Liu Hong
School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
Keywords:
zigzag graphene nanoribbon; band structure; spin-orbit coupling; edge states
PACS:
O469
DOI:
10.3969/j.issn.1001-4616.2018.01.009
Abstract:
Based on the Kane-Mele tight binding model,including spin orbit couplings(SOCs)and Zeeman effect,we introduce a more reasonable self-consistent on-site Coulomb interactions(O-CIs)to analyze and study the band structure and the characteristics of electronic distribution for edge bands. The research results show that the SOCs can lead to spin-flitting and let a small energy gap appear,the O-CIs can increase the energy gap and enlarge the region of edge states,and the Zeeman effect can protect the original topological properties of edge bands passing through the energy gap,it also protects the spin polarization characteristics at the edge sites. The four edge bands are classified into the left and the right sets of edge sub-band,corresponding to the left and the right energy gap and Fermi wave vector. Its spin quantum Hall system belongs to the type B.

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Last Update: 2018-03-31