Ab Initio Analysis of a Quantum Dot Induced by a Local External Potential in a Semiconducting Carbon Nanotube

• Authors: T. Kostyrko , S. Krompiewski
• Languages of publication: EN

Abstracts

EN

Using the density functional theory we study the influence of external charge probes on the electronic structure of semiconducting carbon nanotubes in the vicinity of the Fermi level. We show that the spatially limited potential due to the probe can create localized electronic states in the energy gap and at the edges of the conductance band. By filling these localized states with additional electrons one obtains a quantum dot, which can be tuned by modifying the properties of the external charge probe. We analyze dependence of the electronic structure of the dot on the spatial extension of the potential as well as on the nanotube radius.

Keywords

EN

61.48.De; 85.35.Kt; 73.21.La; 73.22.-f

Discipline

• 85.35.Kt: Nanotube devices
• 61.48.De: Structure of carbon nanotubes, boron nanotubes, and other related systems(for structure of hollow nanowires, see 61.46.Np)
• 73.22.-f: Electronic structure of nanoscale materials and related systems
• 73.21.La: Quantum dots

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 387-389

Dates

published

2009-01

Contributors

author

T. Kostyrko

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

S. Krompiewski

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.115.387