Deutsch Intern
    Faculty of Physics and Astronomy

    Würzburg ToCoTronics Colloquium

    "Resonance Raman with infrared laser excitation in 2D materials: from graphene to MoTe2"
    Date: 02/09/2023, 4:15 PM - 6:00 PM
    Category: Kolloquium
    Location: Hubland Süd, Geb. P1 (Physik), HS P (Röntgen HS)
    Organizer: SFB 1170 ToCoTronics
    Speaker: Leonetta Baldassarre - Department of Physics, Sapienza University of Rome

    Resonance Raman scattering has been proven to be a key asset to study small-gap semiconductors and materials that display a Dirac cone such as graphene[1]. 
    I will discuss the resonance Raman spectrum obtained with excitation energy at 1.16 eV in graphene, where we find an enhancement of the electron phonon coupling [2], and in MoSe2[3], where, thanks to a resonant process it has been possible to identify the phonon branches involved in the higher order Raman modes. Last, I will present the resonant Raman spectrum of MoTe2 with excitation laser energy of 0.86 eV, discussing the perspectives of technological developments for resonance Raman in the infrared. 

    [1] A. C. Ferrari and D. M. Basko, Nat. Nanotech. 8, 235 (2013). 

    [2]  T. Venanzi et al. arXiv:2212.01342 

    [3] S. Sotgiu, T. Venanzi, F. Macheda, E. Stellino, M. Ortolani,  P. Postorino, and L. Baldassarre,  Phys. Rev. B 106, 085204 (2022) 

    This talk is also broadcasted via zoom. To enter the meeting, follow the link: