Nicolas Doiron-Leyraud, Département de physique, Université de Sherbrooke, Sherbrooke, QC, Canada.
Under the influence of a magnetic field, electrons in solids perform cyclotron orbits along quantized Landau levels. A key manifestation of this phenomenon is the appearance of quantum oscillations in transport and thermodynamic properties, which directly relate to the fundamental electronic ground state of a given material, providing for instance the carrier mass and the Fermi surface topology. Moreover, the phase of the oscillations allows a direct measurement of the geometrical Berry phase, an essential characteristic of condensed matter systems. For these reasons, quantum oscillations have been a central probe in the study of a wide range of materials, from heavy fermions superconductors to quantum Hall devices. In recent years, the observation of quantum oscillations in high-temperature superconductors has opened up a major novel window of investigation, which I will discuss in the light of our recent measurements carried out using very high magnetic fields.
Site web du groupe du Prof. Doiron-Leyraud
Cette conférence est présentée par le RQMP Versant Nord du Département de physique de l'Université de Montréal et le Département de génie physique de Polytechnique Montréal.
