The anomalous de Haas-van Alphen effect and Excitons in a topological Kondo insulator
- Date
- Jul 27, 2017
- Time
- 2:00 PM - 3:00 PM
- Speaker
- Johannes Knolle
- Affiliation
- TCM Group, Cavendish Laboratory, University of Cambridge
- Language
- en
- Main Topic
- Physik
- Description
- The de Haas-van Alphen effect, describing oscillations of the magnetization as a function of magnetic field, is commonly assumed to be a definite sign for the presence of a Fermi surface (FS) in a metal. Here we show that, in contrast to this canonical situation, there can be quantum oscillations even for insulators of certain types. We draw connections to recent experiments on the topological Kondo insulator (TKI) candidate SmB$_6$. In addition, we show that TKIs are susceptible to the formation of bound electron-hole pairs. These excitons can account for long-standing thermodynamic and recent transport anomalies in SmB$_6$ which is crucial for the identification of bulk topological signatures.
Last modified: Jul 27, 2017, 9:38:38 AM
Location
Max-Planck-Institut für Physik komplexer Systeme (Room 1D1)Nöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
Organizer
Max-Planck-Institut für Physik komplexer SystemeNöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
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