Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.56: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Investigation of de Haas-van Alphen oscillations under temperature modulation in Bi — •Michelle Hollricher, Christian Pfleiderer, and Marc A. Wilde — Physik-Department, Technical University of Munich, D-85748 Garching, Germany

The properties of Bi have become the drosophila of studies of the electronic structure and the Fermi surface of metals [1-4]. An inherent constraint of present-day detection techniques of quantum oscillations concerns the separation of signal components associated with large differences of the effective charge carrier masses. We report the development of a detection technique for measurements of the de Haas-van Alphen (dHvA) effect by means of an inductive signal pick-up that is driven by temperature oscillations of the sample [1]. Resulting in an effective convolution of the oscillatory signal components with the derivative of the effective charge carrier mass with respect to temperature, our setup permits to discriminate elegantly light from heavy masses, and allows in-situ determination of the charge carrier effective masses. We have revisited the dHvA effect in Bi, focusing on the nature and character of the electron pockets.
[1] D. Shoenberg, Magnetic oscillations in metals, Cambridge Monographs in Physics.
[2] V.S. Édel’man, Adv. Phys. 25, 555 (1976).
[3] K. Behnia et al., Science 317, 1729 (2007).
[4] Z. Zhu et al., J. Phys.: Condens. Matter 309, 313001 (2018).