Kohn Anomaly and Electron-Phonon Interaction at the K-Derived Point of the Brillouin Zone of Metallic Nanotubes

Rafailov PM, Maultzsch J, Thomsen C, Dettlaff-Weglikowska U, Roth S (2009)

Publication Status: Published

Publication Type: Journal article

Publication year: 2009

Journal

Nano Letters American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 9

Pages Range: 3343-3348

Journal Issue: 9

DOI: 10.1021/nl901618q

Abstract

We applied Raman spectroscopy to investigate the response to electrochemical doping of the second-order D* band in single-walled carbon nanotube (SWNT) bundles. Our study reveals a dramatic increase of the D* band sensitivity to doping upon moving the laser excitation to the red end of the visible spectrum and beyond. Using the double-resonance scattering model, we show that this phenomenon evidences a second Kohn anomaly in metallic SWNTs, located in the K-point-derived region of the Brillouin zone (BZ), which stems from the Kohn anomaly at the K-point of graphene. Our results will be compared to recent doping experiments on graphene with field-effect gating and can be used to investigate the wave-vector dependent electron-phonon coupling in the bulk of the BZ of metallic SWNTs.

Authors with CRIS profile

Janina Maultzsch Lehrstuhl für Experimentalphysik

Involved external institutions

Max-Planck-Institut für Festkörperforschung DE Germany (DE) Bulgarian Academy of Sciences (BAS) / Българска академия на науките BG Bulgaria (BG) Technische Universität Berlin DE Germany (DE)

How to cite

APA:

Rafailov, P.M., Maultzsch, J., Thomsen, C., Dettlaff-Weglikowska, U., & Roth, S. (2009). Kohn Anomaly and Electron-Phonon Interaction at the K-Derived Point of the Brillouin Zone of Metallic Nanotubes. Nano Letters, 9(9), 3343-3348. https://dx.doi.org/10.1021/nl901618q

MLA:

Rafailov, Peter M., et al. "Kohn Anomaly and Electron-Phonon Interaction at the K-Derived Point of the Brillouin Zone of Metallic Nanotubes." Nano Letters 9.9 (2009): 3343-3348.

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