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TT: Fachverband Tiefe Temperaturen

TT 52: Transport: Graphene 2 (jointly with MA, HL, DY, DS, O)

TT 52.2: Vortrag

Freitag, 30. März 2012, 09:45–10:00, BH 334

Inelastic Raman scattering on electronic excitations in graphene and carbon nanotubes — •Oleksiy Kashuba¹ and Vladimir Fal’ko² — ¹Institut für Theorie der statistischen Physik, RWTH Aachen, 52056 Aachen, Deutschland — ²Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK

Raman measurements in carbon allotropes are generally associated with the exploration of the vibrational modes. We present a theory of the non-resonant inelastic light scattering accompanied by the excitations of electron-hole pairs and predict the selection rules and polarization properties of the dominant Raman active modes. The prediction of the Raman plot profile for graphene at high magnetic field with pronounced peaks corresponding to the inter-Landau-level transitions [1,2] was confirmed by subsequent experiment [3]. We also provide a theory of Raman scattering on intersubband electron-hole pairs in large diameter carbon nanotubes predicting dominant polarisations and Raman spectra featuring a pattern of van Hove singularities [4].
O. Kashuba and V. I. Fal’ko, Phys. Rev. B 80, 241404(R) (2009).
M. Mucha-Kruczyński, O. Kashuba, and V. I. Fal’ko, Phys. Rev. B 82, 045405 (2010).
C. Faugeras et. al., Phys. Rev. Lett. 107, 036807 (2011).
O. Kashuba and V. I. Fal’ko, submitted to PRL (2011), arXiv:1111.1413