The fermi level dependent electronic properties of the smallest (2,2) carbon nanotube

Li Chang Yin; Riichiro Saito; Mildred S. Dresselhaus

doi:10.1021/nl100846u

The fermi level dependent electronic properties of the smallest (2,2) carbon nanotube

Li Chang Yin, Riichiro Saito, Mildred S. Dresselhaus

SCI - Physics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A metal-semiconductor transition in the smallest (2,2) single-wall carbon nanotube (SWNT) is predicted theoretically as a function of gate voltage. By hole-doping (or heavy electron-doping), the energy gap of a neutral (2,2) SWNT vanishes with structural change, and the (2,2) SWNT becomes metallic. The (2,2) tube assumes a doubly degenerate ground state around the charge neutral condition with an energy barrier, while this tube has only one nondegenerate metallic ground state over an energy window of -0.12 to +0.40 eV. Because of a high density of states at the Fermi energy for hole-doped (2,2) SWNTs, a possible superconducting transition is expected.

Original language	English
Pages (from-to)	3290-3296
Number of pages	7
Journal	Nano Letters
Volume	10
Issue number	9
DOIs	https://doi.org/10.1021/nl100846u
Publication status	Published - 2010 Sept 8

Keywords

(2,2) carbon nanotube
Fermi level
electrochemical doping
metal-semiconductor transition
superconductivity

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl100846u

Cite this

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title = "The fermi level dependent electronic properties of the smallest (2,2) carbon nanotube",

abstract = "A metal-semiconductor transition in the smallest (2,2) single-wall carbon nanotube (SWNT) is predicted theoretically as a function of gate voltage. By hole-doping (or heavy electron-doping), the energy gap of a neutral (2,2) SWNT vanishes with structural change, and the (2,2) SWNT becomes metallic. The (2,2) tube assumes a doubly degenerate ground state around the charge neutral condition with an energy barrier, while this tube has only one nondegenerate metallic ground state over an energy window of -0.12 to +0.40 eV. Because of a high density of states at the Fermi energy for hole-doped (2,2) SWNTs, a possible superconducting transition is expected.",

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AU - Yin, Li Chang

AU - Saito, Riichiro

AU - Dresselhaus, Mildred S.

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Y1 - 2010/9/8

N2 - A metal-semiconductor transition in the smallest (2,2) single-wall carbon nanotube (SWNT) is predicted theoretically as a function of gate voltage. By hole-doping (or heavy electron-doping), the energy gap of a neutral (2,2) SWNT vanishes with structural change, and the (2,2) SWNT becomes metallic. The (2,2) tube assumes a doubly degenerate ground state around the charge neutral condition with an energy barrier, while this tube has only one nondegenerate metallic ground state over an energy window of -0.12 to +0.40 eV. Because of a high density of states at the Fermi energy for hole-doped (2,2) SWNTs, a possible superconducting transition is expected.

AB - A metal-semiconductor transition in the smallest (2,2) single-wall carbon nanotube (SWNT) is predicted theoretically as a function of gate voltage. By hole-doping (or heavy electron-doping), the energy gap of a neutral (2,2) SWNT vanishes with structural change, and the (2,2) SWNT becomes metallic. The (2,2) tube assumes a doubly degenerate ground state around the charge neutral condition with an energy barrier, while this tube has only one nondegenerate metallic ground state over an energy window of -0.12 to +0.40 eV. Because of a high density of states at the Fermi energy for hole-doped (2,2) SWNTs, a possible superconducting transition is expected.

KW - (2,2) carbon nanotube

KW - Fermi level

KW - electrochemical doping

KW - metal-semiconductor transition

KW - superconductivity

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The fermi level dependent electronic properties of the smallest (2,2) carbon nanotube

Abstract

Keywords

ASJC Scopus subject areas

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