Quantum dots from carbon nanotube junctions

Fabrizio Cleri; Pawel Keblinski; Inkook Jang; Susan B. Sinnott

doi:10.1557/proc-789-n17.7

Quantum dots from carbon nanotube junctions

Fabrizio Cleri, Pawel Keblinski, Inkook Jang, Susan B. Sinnott

Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

A tight-binding hamiltonian is used to study the electronic properties of covalently-bonded, crossed (5,5) metallic nanotubes with increasing degree of disorder in the junction region. At one extreme, ideal junctions between coplanar nanotubes with a minimal number of topological defects show a good ohmic behavior. Upon increasing disorder, ohmic conduction is suppressed in favor of hopping conductivity. At the opposite extreme, strongly disordered junctions as could be obtained after electron-beam irradiation of overlayed nanotubes, display weak localization and energy quantization, indicating the formation of a quantum dot contacted to metallic nanowires by tunnel barriers.

Original language	English (US)
Pages (from-to)	417-423
Number of pages	7
Journal	Materials Research Society Symposium - Proceedings
Volume	789
DOIs	https://doi.org/10.1557/proc-789-n17.7
State	Published - 2003
Event	Quantum Dots, Nanoparticles and Nanowires - Boston, MA, United States Duration: Dec 1 2003 → Dec 5 2003

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Quantum dots from carbon nanotube junctions",

abstract = "A tight-binding hamiltonian is used to study the electronic properties of covalently-bonded, crossed (5,5) metallic nanotubes with increasing degree of disorder in the junction region. At one extreme, ideal junctions between coplanar nanotubes with a minimal number of topological defects show a good ohmic behavior. Upon increasing disorder, ohmic conduction is suppressed in favor of hopping conductivity. At the opposite extreme, strongly disordered junctions as could be obtained after electron-beam irradiation of overlayed nanotubes, display weak localization and energy quantization, indicating the formation of a quantum dot contacted to metallic nanowires by tunnel barriers.",

author = "Fabrizio Cleri and Pawel Keblinski and Inkook Jang and Sinnott, {Susan B.}",

year = "2003",

doi = "10.1557/proc-789-n17.7",

language = "English (US)",

volume = "789",

pages = "417--423",

journal = "Materials Research Society Symposium - Proceedings",

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note = "Quantum Dots, Nanoparticles and Nanowires ; Conference date: 01-12-2003 Through 05-12-2003",

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TY - JOUR

T1 - Quantum dots from carbon nanotube junctions

AU - Cleri, Fabrizio

AU - Keblinski, Pawel

AU - Jang, Inkook

AU - Sinnott, Susan B.

PY - 2003

Y1 - 2003

N2 - A tight-binding hamiltonian is used to study the electronic properties of covalently-bonded, crossed (5,5) metallic nanotubes with increasing degree of disorder in the junction region. At one extreme, ideal junctions between coplanar nanotubes with a minimal number of topological defects show a good ohmic behavior. Upon increasing disorder, ohmic conduction is suppressed in favor of hopping conductivity. At the opposite extreme, strongly disordered junctions as could be obtained after electron-beam irradiation of overlayed nanotubes, display weak localization and energy quantization, indicating the formation of a quantum dot contacted to metallic nanowires by tunnel barriers.

AB - A tight-binding hamiltonian is used to study the electronic properties of covalently-bonded, crossed (5,5) metallic nanotubes with increasing degree of disorder in the junction region. At one extreme, ideal junctions between coplanar nanotubes with a minimal number of topological defects show a good ohmic behavior. Upon increasing disorder, ohmic conduction is suppressed in favor of hopping conductivity. At the opposite extreme, strongly disordered junctions as could be obtained after electron-beam irradiation of overlayed nanotubes, display weak localization and energy quantization, indicating the formation of a quantum dot contacted to metallic nanowires by tunnel barriers.

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U2 - 10.1557/proc-789-n17.7

DO - 10.1557/proc-789-n17.7

M3 - Conference article

AN - SCOPUS:2942631240

SN - 0272-9172

VL - 789

SP - 417

EP - 423

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Quantum Dots, Nanoparticles and Nanowires

Y2 - 1 December 2003 through 5 December 2003

ER -

Quantum dots from carbon nanotube junctions

Abstract

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