CUED Publications database

Magnetophonon resonance in graphite: High-field Raman measurements and electron-phonon coupling contributions

Kim, Y and Ma, Y and Imambekov, A and Kalugin, NG and Lombardo, A and Ferrari, AC and Kono, J and Smirnov, D (2012) Magnetophonon resonance in graphite: High-field Raman measurements and electron-phonon coupling contributions. Physical Review B - Condensed Matter and Materials Physics, 85. ISSN 1098-0121

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Abstract

We perform Raman scattering experiments on natural graphite in magnetic fields up to 45 T, observing a series of peaks due to interband electronic excitations over a much broader magnetic field range than previously reported. We also explore electron-phonon coupling in graphite via magnetophonon resonances. The Raman G peak shifts and splits as a function of magnetic field, due to the magnetically tuned coupling of the E 2g optical phonons with the K- and H-point inter-Landau-level excitations. The analysis of the observed anticrossing behavior allows us to determine the electron-phonon coupling for both K- and H-point carriers. In the highest field range (>35 T) the G peak narrows due to suppression of electron-phonon interaction. © 2012 American Physical Society.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron job
Date Deposited: 04 Feb 2015 22:52
Last Modified: 05 Feb 2015 07:40
DOI: 10.1103/PhysRevB.85.121403