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

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Rafailov PM, Maultzsch J, Thomsen C, Dettlaff-Weglikowska U, Roth S
Zeitschrift: Nano Letters
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2009
Band: 9
Heftnummer: 9
Seitenbereich: 3343-3348
ISSN: 1530-6984


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.



FAU-Autoren / FAU-Herausgeber

Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik


Autor(en) der externen Einrichtung(en)
Bulgarian Academy of Sciences (BAS) / Българска академия на науките
Max-Planck-Institut für Festkörperforschung
Technische Universität Berlin


Zitierweisen

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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