Electronic properties of single and double wall carbon nanotubes

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electronic properties of single and double wall carbon nanotubes

Popis výsledku v původním jazyce

The electronic spectra of single wall and also double wall carbon nan- otubes using tight binding approximation are investigated. We focus on the double wall zig-zag and armchair nanotubes. The influence of nan- otube curvature on the electronic spectra is also treated. The impact of the external magnetic field on the spectral characteristic of double wall nan- otubes is computed. The strong changes of the electronic spectra caused by the different geometry of the zig-zag and armchair nanotubes have strong impact on their character of conductivity. We found the big change of the electronic spectra for the double walled carbon nanotubes due to the external magnetic field. The difference in the Fermi energy between outer and inner nanotube for double wall carbon nanotubes was found which originate from the different hybridization of π orbital. The spectral characteristics are very different for the double wall zig-zag and armchair nanotubes. The electronic states of finite length zig-zag single wall carbon nanotubes were treated. The analytical solutions for the electronic spectra in finite length zig-zag nanotubes were derived. It was shown that the static magnetic field in such systems can change the number of the edge states and also split the degeneracy of the edge states. The results of our calculations are presented analytically as well as numerically.

Název v anglickém jazyce

Electronic properties of single and double wall carbon nanotubes

Popis výsledku anglicky

The electronic spectra of single wall and also double wall carbon nan- otubes using tight binding approximation are investigated. We focus on the double wall zig-zag and armchair nanotubes. The influence of nan- otube curvature on the electronic spectra is also treated. The impact of the external magnetic field on the spectral characteristic of double wall nan- otubes is computed. The strong changes of the electronic spectra caused by the different geometry of the zig-zag and armchair nanotubes have strong impact on their character of conductivity. We found the big change of the electronic spectra for the double walled carbon nanotubes due to the external magnetic field. The difference in the Fermi energy between outer and inner nanotube for double wall carbon nanotubes was found which originate from the different hybridization of π orbital. The spectral characteristics are very different for the double wall zig-zag and armchair nanotubes. The electronic states of finite length zig-zag single wall carbon nanotubes were treated. The analytical solutions for the electronic spectra in finite length zig-zag nanotubes were derived. It was shown that the static magnetic field in such systems can change the number of the edge states and also split the degeneracy of the edge states. The results of our calculations are presented analytically as well as numerically.

Druh

C - Kapitola v odborné knize

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Carbon Nanotubes: Synthesis and Properties

ISBN

978-1-62081-914-2

Počet stran výsledku

24

Strana od-do

202-225

Počet stran knihy

413

Název nakladatele

Nova Science Publisher, Inc.

Místo vydání

Hauppauge NY

Kód UT WoS kapitoly

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