Magneto-optical spectroscopy of highly aligned carbon nanotubes: Identifying the role of threading magnetic flux

J. Shaver; S. A. Crooker; J. A. Fagan; E. K. Hobbie; N. Ubrig; O. Portugall; V. Perebeinos; Ph Avouris; J. Kono

doi:10.1103/PhysRevB.78.081402

Magneto-optical spectroscopy of highly aligned carbon nanotubes: Identifying the role of threading magnetic flux

J. Shaver
, S. A. Crooker
, J. A. Fagan
, E. K. Hobbie
, N. Ubrig
, O. Portugall
, V. Perebeinos
, Ph Avouris
, J. Kono

Department of Electrical Engineering

Rice University
United States Department of Energy
National Institute of Standards and Technology
Laboratoire National des Champs Magnétiques Pulsés
IBM

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

29 Scopus citations

Abstract

We have investigated excitons in highly aligned single-walled carbon nanotubes (SWCNTs) through optical spectroscopy at low temperatures down to 1.5 K and high magnetic fields (B) up to 55 T. SWCNT/polyacrylic acid films were stretched, giving SWCNTs that are highly aligned along the direction of stretch (n). Utilizing two well-defined measurement geometries, n B and n B, we provide unambiguous evidence that the photoluminescence energy and intensity are only sensitive to the B -component parallel to the tube axis. A theoretical model of one-dimensional magnetoexcitons, based on exchange-split "bright" and "dark" exciton bands with Aharonov-Bohm-phase-dependent energies, masses, and oscillator strengths, successfully reproduces our observations and allows determination of the splitting between the two bands as ∼4.8 meV for (6,5) SWCNTs.

Original language	English
Article number	081402
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.78.081402
State	Published - Aug 4 2008

Access to Document

10.1103/PhysRevB.78.081402

Cite this

Shaver, J., Crooker, S. A., Fagan, J. A., Hobbie, E. K., Ubrig, N., Portugall, O., Perebeinos, V., Avouris, P., & Kono, J. (2008). Magneto-optical spectroscopy of highly aligned carbon nanotubes: Identifying the role of threading magnetic flux. Physical Review B - Condensed Matter and Materials Physics, 78(8), Article 081402. https://doi.org/10.1103/PhysRevB.78.081402

@article{ea4162eec8bf4fdfae0af0984f0e863f,

title = "Magneto-optical spectroscopy of highly aligned carbon nanotubes: Identifying the role of threading magnetic flux",

abstract = "We have investigated excitons in highly aligned single-walled carbon nanotubes (SWCNTs) through optical spectroscopy at low temperatures down to 1.5 K and high magnetic fields (B) up to 55 T. SWCNT/polyacrylic acid films were stretched, giving SWCNTs that are highly aligned along the direction of stretch (n). Utilizing two well-defined measurement geometries, n B and n B, we provide unambiguous evidence that the photoluminescence energy and intensity are only sensitive to the B -component parallel to the tube axis. A theoretical model of one-dimensional magnetoexcitons, based on exchange-split {"}bright{"} and {"}dark{"} exciton bands with Aharonov-Bohm-phase-dependent energies, masses, and oscillator strengths, successfully reproduces our observations and allows determination of the splitting between the two bands as ∼4.8 meV for (6,5) SWCNTs.",

author = "J. Shaver and Crooker, \{S. A.\} and Fagan, \{J. A.\} and Hobbie, \{E. K.\} and N. Ubrig and O. Portugall and V. Perebeinos and Ph Avouris and J. Kono",

year = "2008",

month = aug,

day = "4",

doi = "10.1103/PhysRevB.78.081402",

language = "English",

volume = "78",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "8",

}

TY - JOUR

T1 - Magneto-optical spectroscopy of highly aligned carbon nanotubes

T2 - Identifying the role of threading magnetic flux

AU - Shaver, J.

AU - Crooker, S. A.

AU - Fagan, J. A.

AU - Hobbie, E. K.

AU - Ubrig, N.

AU - Portugall, O.

AU - Perebeinos, V.

AU - Avouris, Ph

AU - Kono, J.

PY - 2008/8/4

Y1 - 2008/8/4

N2 - We have investigated excitons in highly aligned single-walled carbon nanotubes (SWCNTs) through optical spectroscopy at low temperatures down to 1.5 K and high magnetic fields (B) up to 55 T. SWCNT/polyacrylic acid films were stretched, giving SWCNTs that are highly aligned along the direction of stretch (n). Utilizing two well-defined measurement geometries, n B and n B, we provide unambiguous evidence that the photoluminescence energy and intensity are only sensitive to the B -component parallel to the tube axis. A theoretical model of one-dimensional magnetoexcitons, based on exchange-split "bright" and "dark" exciton bands with Aharonov-Bohm-phase-dependent energies, masses, and oscillator strengths, successfully reproduces our observations and allows determination of the splitting between the two bands as ∼4.8 meV for (6,5) SWCNTs.

AB - We have investigated excitons in highly aligned single-walled carbon nanotubes (SWCNTs) through optical spectroscopy at low temperatures down to 1.5 K and high magnetic fields (B) up to 55 T. SWCNT/polyacrylic acid films were stretched, giving SWCNTs that are highly aligned along the direction of stretch (n). Utilizing two well-defined measurement geometries, n B and n B, we provide unambiguous evidence that the photoluminescence energy and intensity are only sensitive to the B -component parallel to the tube axis. A theoretical model of one-dimensional magnetoexcitons, based on exchange-split "bright" and "dark" exciton bands with Aharonov-Bohm-phase-dependent energies, masses, and oscillator strengths, successfully reproduces our observations and allows determination of the splitting between the two bands as ∼4.8 meV for (6,5) SWCNTs.

UR - https://www.scopus.com/pages/publications/49249127784

U2 - 10.1103/PhysRevB.78.081402

DO - 10.1103/PhysRevB.78.081402

M3 - Article

AN - SCOPUS:49249127784

SN - 1098-0121

VL - 78

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 081402

ER -

Magneto-optical spectroscopy of highly aligned carbon nanotubes: Identifying the role of threading magnetic flux

Abstract

Access to Document

Other files and links

Fingerprint

Cite this