Past colloquia and seminars


Exponential decay in inter-Landau level transitions of Dirac semimetals

Academic or specialist Other

In magneto-optics experiments on Dirac semimetals, inter-Landau levels transitions are typically seen in color plots representing a « fan diagram ». The evolution of the peak width according to the magnetic field B and the transition index n gives useful information about the relaxation time τ of the electrons. In this work, two approaches were developed to extract the peak width from the color plot. The first approach is based on peak detection followed by Gaussian fitting. The second approach applies a variable change and leads to an empirical law of exponentially decaying cosine. The relevance of this newly found relation was tested on different samples. Finally, the comparison between both approaches provides an optimal algorithm to automate the peak width extraction.

When? 21.06.2022 14:00
Where? PER 08 2.73
Chemin du Musée 3
1700 Fribourg
speaker Papaux Olivier ,présentation du travail de Master de Physique
Groupe Akrap
Contact Département de Physique
Prof. Akrap