Semiconducting states and transport in metallic armchair-edged graphene nanoribbons

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	Semiconducting states and transport in metallic armchair-edged graphene nanoribbons
	X. W. Chen; H. Y. Wang; H. Q. Wan; K. H. Song; G. H. Zhou
	2011
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	23 期号:31
摘要	Based on the nonequilibrium Green's function method within the tight-binding approximation scheme, through a scanning tunneling microscopy (STM) model, we study the low-energy electronic states and transport properties of carbon chains in armchair-edged graphene nanoribbons (AGNRs). We show that semiconducting AGNRs possess only semiconducting chains, while metallic ones possess not only metallic chains but also unconventional semiconducting chains located at the 3 j th (j not equal 0) column from the edge (the first chain) due to the vanishing of the metallic component in the electron wavefunction. The two types of states for carbon chains in a metallic AGNR system are demonstrated by different density of states and STM tunneling currents. Moreover, a similar phenomenon is predicted in the edge region of very wide AGNRs. However, there is remarkable difference in the tunneling current between narrow and wide ribbons.
部门归属	[chen, xiongwen; wang, haiyan; wan, haiqing; zhou, guanghui] hunan normal univ, minist educ, dept phys, changsha 410081, hunan, peoples r china. [chen, xiongwen; wang, haiyan; wan, haiqing; zhou, guanghui] hunan normal univ, minist educ, key lab low dimens struct & quantum manipulat, changsha 410081, hunan, peoples r china. [chen, xiongwen; song, kehui] huaihua univ, dept phys & elect informat sci, huaihua 418008, peoples r china. [zhou, guanghui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;chen, xw (reprint author), hunan normal univ, minist educ, dept phys, changsha 410081, hunan, peoples r china;ghzhou@hunnu.edu.cn
关键词	Dirac Fermions Graphite
URL	查看原文
WOS记录号	WOS:000293008900005
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30271
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. W. Chen,H. Y. Wang,H. Q. Wan,et al. Semiconducting states and transport in metallic armchair-edged graphene nanoribbons[J]. Journal of Physics-Condensed Matter,2011,23(31).
APA	X. W. Chen,H. Y. Wang,H. Q. Wan,K. H. Song,&G. H. Zhou.(2011).Semiconducting states and transport in metallic armchair-edged graphene nanoribbons.Journal of Physics-Condensed Matter,23(31).
MLA	X. W. Chen,et al."Semiconducting states and transport in metallic armchair-edged graphene nanoribbons".Journal of Physics-Condensed Matter 23.31(2011).

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