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Anomalous Quantum Oscillations in Insulators and Metals

date
22.11.2018 
time
02:00 PM - 03:30 PM 
speaker
Dr. Johannes Knolle 
affiliation
Imperial College London, UK 
language
en 
main topic
Physics: general
host
Prof. Dr. C. Felser, Prof. J. Grin, Prof. Dr. A. Mackenzie, Prof. Dr. L. Tjeng 
abstract

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 metallic material. Here we show that, in contrast to this canonical situation, there can be quantum oscillations even for insulators of certain types. We provide examples for quantum oscillations emerging in inverted (topological) band insulators or, alternatively, in correlated Kondo insulators due to the formation of collective modes. Finally, I will discuss how anomalous quantum oscillations may also appear in metallic systems. I will show that magnetic field-induced density wave instabilities in type-II Weyl semimetals lead to remarkable magneto-transport properties.

 

Last update: 16.11.2018 00:08.

venue 

Max-Planck-Institut für Chemische Physik fester Stoffe (Seminarraum 1+2, Nöthnitzer Straße 40, 01187 Dresden) 
Nöthnitzer Straße 40
01187 Dresden
e-mail
Max-Planck-Institut für Chemische Physik fester Stoffe 
homepage
http://www.cpfs.mpg.de/ 

organizer 

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI-CPfS)
Nöthnitzer Straße 40
01187 Dresden
e-mail
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI-CPfS) 
homepage
http://www.cpfs.mpg.de/ 
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