Team

Quasiparticle Spectroscopy (SQUAP)

Scientific activity

The SQUAP team is interested in electron dynamics in systems with strong electronic correlations, where often competing electronic phases develop. In recent years, the group has focused on understanding unconventional superconductivity in copper oxides and iron pnictures, electro-magnons in multiferroic materials and their potential applications. The SQUAP team has recently turned its attention to ultra-fast charge carrier dynamics in topological Dirac and Weyl semi-metals and 2D crystals such as graphene and transition metal dichalcogenides (TMDs). To study these materials, our preferred probes are electronic Raman spectroscopy, which gives access to low-energy electronic and vibrational excitations, and Terahertz spectroscopy, which gives access to the measurement of optical constants over a wide range of frequencies. Both are used for static and dynamic applications. We also operate a Raman microscopy platform coupled to an AFM for characterizing materials that may also be organic.

© Alexandr Alekhin, 2022.

Figure: Visible electron Raman scattering experiment carried out by the SQUAP (Quasiparticle Spectroscopy) team at the Quantum Materials and Phenomena Laboratory.