Quantum oscillations in insulators

20.02.2018 13:00 – 14:30

The de Haas - van Alphen effect, describing oscillations of the magnetization as a function of magnetic field, is commonly assumed to be a definitive sign of a Fermi surface. Indeed, the effect forms the basis of a well-established experimental procedure for measuring Fermi surface topology and geometry in metallic systems. In this talk, I shall show that, in contrast to this canonical situation, there can be quantum oscillations even for band insulators of certain types. I shall describe the general theory of these anomalous magnetic oscillations, and its possible relevance in experiments on topological Kondo insulators and on semiconductor quantum wells.

Lieu

Bâtiment: Ecole de Physique

Auditoire Stuckelberg

entrée libre