Electronic states in carbon nanotube quantum-dots

被引:0
作者
Rocha, CG [1 ]
Dargam, TG [1 ]
Muniz, RB [1 ]
Latgé, A [1 ]
机构
[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil
关键词
D O I
10.1590/S0103-97332002000200051
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present a theoretical study on local electronic properties of quantum-dot nanotubes formed by connecting pure semiconducting and metallic nanotubes via appropriate junctions. The junctions are formed by introducing pair-defects composed by heptagon and pentagon along the axial direction of pure nanotubes. We investigate the dependence of the confined electronic states with the characteristic sizes of the quantum dot taking it account different based-nanotube heterostructures. Quantum-well like and interface states are characterized by investigating the spatial dependence of the local density of states of the discrete levels. We follow the Green function formalism and adopt real-space renormalization techniques in the derivation of local density of states.
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页码:424 / 426
页数:3
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