Topological conditions for impurity effects in carbon nanosystems

被引:3
作者
Pogorelov, Yuriy G. [1 ]
Loktev, Vadim M. [2 ,3 ]
机构
[1] Univ Porto, Dept Fis, IFIMUP IN, P-4169007 Porto, Portugal
[2] NAS Ukraine, NN Bogolyubov Inst Theoret Phys, UA-03134 Kyiv, Ukraine
[3] Igor Sikorsky Kyiv Polytech Inst, UA-03056 Kyiv, Ukraine
关键词
ELECTRONIC-PROPERTIES; GRAPHENE; NANOTUBES; STATES; CONDUCTION; LOCALIZATION; TRANSPORT; ABSENCE; SHAPE; SIZE;
D O I
10.1103/PhysRevB.110.075142
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We consider electronic spectra of carbon nanotubes and their perturbation by impurity atoms absorbed at different positions on nanotube surfaces, within the framework of the Anderson hybrid model. Special attention is given to the cases in which Dirac-like 1D modes appear in the nanotube spectrum and their hybridization with localized impurity states produces, at growing impurity concentration c, onset of a mobility gap near the impurity level and even opening, at yet higher c, of some narrow delocalized range within this mobility gap. Such behaviors are compared with similar effects in the previously studied 2D graphene and armchair-type graphene nanoribbons. Some possible practical applications are discussed.
引用
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页数:13
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