Springe direkt zu Inhalt

Physics Colloquium: Prof. Dr. Johannes Knolle - Anomalous Quantum Oscillations in Metals and Insulators

May 05, 2023 | 03:00 PM c.t.
Prof. Dr. Johannes Knolle

Prof. Dr. Johannes Knolle
Image Credit: TU München

Technical University of Munich

Quantum oscillation phenomena describe the periodic variation of thermodynamic and transport properties of materials as a function of magnetic field. Since their discovery in 1930, their observation is commonly assumed to be a definite sign for the presence of a Fermi surface (FS) in a metal. Indeed, the effect forms the basis of a well-established experimental procedure for accurately measuring FS topology and geometry of metallic systems.

In this talk, I will discuss recent developments which challenge the canonical description of quantum oscillations. I will first review our work on quantum oscillations in insulators. Next, I will discuss the possibility of sharp quantum oscillation frequencies in metals which do not correspond to Fermi surface orbits and the effect of strong electron interactions.

Finally, I will present experimental results confirming our theoretical predictions and discuss the broader implications of anomalous quantum oscillations.

Time & Location

May 05, 2023 | 03:00 PM c.t.

Lecture Hall A (1.3.14)

Further Information


Prof. Dr. Piet Brouwer


  • electron interactions
  • Fermi surface
  • insulators
  • Johannes Knolle
  • magnetic field
  • metals
  • oscillation
  • quantum oscillations
  • sharp quantum oscillation frequencies
  • thermodynamics
  • TU Munich
  • TUM