Magneto-optical spectroscopy of excitons in carbon nanotubes

Shaver J, Kono J, Portugall O, Krstic V, Rikken GL, Miyauchi Y, Maruyama S, Perebeinos V (2006)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2006

Journal

Physica Status Solidi-Rapid Research Letters Wiley-VCH Verlag

Book Volume: 243

Pages Range: 3192-3196

Journal Issue: 13

DOI: 10.1002/pssb.200669209

Abstract

We describe recent results of optical experiments on single-walled carbon nanotubes in high magnetic fields, probing the influence of a tube-threading magnetic flux on their band structure and excitonic states. The magnetic flux breaks the time-reversal symmetry and thus lifts the K –K ′ valley degeneracy, and the amount of state splitting is determined by the Aharonov–Bohm phase. We show experimental evidence that this field-induced symmetry breaking overcomes the Coulomb-induced exciton splitting which is predicted to make the lowest singlet exciton state optically inactive (or “dark”). Thus, a magnetic field applied parallel to the tube axis “brightens” the dark exciton, resulting in a drastic increase in photoluminescence intensity with magnetic field. We also find that the amount of brightening increases with decreasing temperature.

Authors with CRIS profile

Vojislav Krstic Professur für Angewandte Physik

Involved external institutions

University of Tokyo JP Japan (JP) IBM Thomas J. Watson Research Center US United States (USA) (US) Rice University US United States (USA) (US) National Center for Scientific Research / Centre national de la recherche scientifique (CNRS) FR France (FR) Laboratoire National des Champs Magnétiques Intenses (LNCMI) / French National High Magnetic Field Laboratory- CNRS FR France (FR)

How to cite

APA:

Shaver, J., Kono, J., Portugall, O., Krstic, V., Rikken, G.L., Miyauchi, Y.,... Perebeinos, V. (2006). Magneto-optical spectroscopy of excitons in carbon nanotubes. Physica Status Solidi-Rapid Research Letters, 243(13), 3192-3196. https://doi.org/10.1002/pssb.200669209

MLA:

Shaver, J., et al. "Magneto-optical spectroscopy of excitons in carbon nanotubes." Physica Status Solidi-Rapid Research Letters 243.13 (2006): 3192-3196.

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