Fano lineshape and phonon softening in single isolated metallic carbon nanotubes

被引：97

作者：

Nguyen, Khoi T.

Gaur, Anshu

Shim, Moonsub ^{[1
]}

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.98.145504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evolution of G-band modes of single metallic carbon nanotubes with the Fermi level shift is examined by simultaneous Raman and electron transport studies. Narrow Lorentzian line shape and upshifted frequencies are observed near the van Hove singularities. However, all G modes soften and broaden at the band crossing point. The concurrent appearance of an asymmetric Fano line shape at this point indicates that phonon-continuum coupling is intrinsic to single metallic tubes. The apparent Lorentzian line shapes of as-synthesized metallic tubes are induced by O-2 adsorption causing the Fermi level shift.

引用

收藏

页数：4

相关论文

共 28 条

[1] Origin of the Breit-Wigner-Fano lineshape of the tangential G-band feature of metallic carbon nanotubes -: art. no. 155414 [J].

Brown, SDM ;

Jorio, A ;

Corio, P ;

Dresselhaus, MS ;

Dresselhaus, G ;

Saito, R ;

Kneipp, K .

PHYSICAL REVIEW B, 2001, 63 (15)

[2] Extreme oxygen sensitivity of electronic properties of carbon nanotubes [J].

Collins, PG ;

Bradley, K ;

Ishigami, M ;

Zettl, A .

SCIENCE, 2000, 287 (5459) :1801-1804

[3] Electrochemical gating of individual single-wall carbon nanotubes observed by electron transport measurements and resonant Raman spectroscopy [J].

Cronin, SB ;

Barnett, R ;

Tinkham, M ;

Chou, SG ;

Rabin, O ;

Dresselhaus, MS ;

Swan, AK ;

Unlü, MS ;

Goldberg, BB .

APPLIED PHYSICS LETTERS, 2004, 84 (12) :2052-2054

[4] Raman spectroscopy of carbon nanotubes [J].

Dresselhaus, MS ;

Dresselhaus, G ;

Saito, R ;

Jorio, A .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 409 (02) :47-99

[5] Phonon softening in metallic nanotubes by a Peierls-like mechanism [J].

Dubay, O ;

Kresse, G ;

Kuzmany, H .

PHYSICAL REVIEW LETTERS, 2002, 88 (23) :4

[6] Reversible surface oxidation and efficient luminescence quenching in semiconductor single-wall carbon nanotubes [J].

Dukovic, G ;

White, BE ;

Zhou, ZY ;

Wang, F ;

Jockusch, S ;

Steigerwald, ML ;

Heinz, TF ;

Friesner, RA ;

Turro, NJ ;

Brus, LE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (46) :15269-15276

[7] Carbon nanotubes as Schottky barrier transistors [J].

Heinze, S ;

Tersoff, J ;

Martel, R ;

Derycke, V ;

Appenzeller, J ;

Avouris, P .

PHYSICAL REVIEW LETTERS, 2002, 89 (10)

[8] Measurement of the quantum capacitance of interacting electrons in carbon nanotubes [J].

Ilani, S. ;

Donev, L. A. K. ;

Kindermann, M. ;

McEuen, P. L. .

NATURE PHYSICS, 2006, 2 (10) :687-691

[9]

Jiang CY, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.161404

[10] Resonance Raman spectra of carbon nanotubes by cross-polarized light -: art. no. 107403 [J].

Jorio, A ;

Pimenta, MA ;

Souza, AG ;

Samsonidze, GG ;

Swan, AK ;

Ünlü, MS ;

Goldberg, BB ;

Saito, R ;

Dresselhaus, G ;

Dresselhaus, MS .

PHYSICAL REVIEW LETTERS, 2003, 90 (10) :4