Non-linear Shubnikov-de Haas oscillations in the self-heating regime

Huang X, Guo C, Putzke C, Diaz J, Manna K, Shekhar C, Felser C, Moll PJW (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 119

Article Number: 224101

Journal Issue: 22

DOI: 10.1063/5.0071939

Abstract

We demonstrate a non-linear measurement scheme of the Shubnikov-de Haas effect based on Joule self-heating that builds on ideas of the 3 ω-method used in thin films. While the temperature dependence of the resistance, R(T), of clean metals at low temperatures saturates, a significant temperature dependence, dR/dT, appears at high fields due to Landau quantization. We experimentally demonstrate this effect in the semi-metal CoSi, resolving well quantum oscillations at low magnetic fields in the non-linear channel, which appear as 3rd harmonics of the current drive frequency. To ensure the dominant self-heating originates in the crystal, not at the contacts, we fabricate crystalline microbars using focused ion beam machining. These oscillations in non-linear channel encode the ratio between the dR/dT and the thermal conductivity of the material, rendering it an interesting probe in situations of the broken Wiedemann-Franz law. Our results present a quantitative methodology that is particularly suited to investigate the electronic structure of micro- and nano-materials at intermediate temperatures.

Involved external institutions

École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Huang, X., Guo, C., Putzke, C., Diaz, J., Manna, K., Shekhar, C.,... Moll, P.J.W. (2021). Non-linear Shubnikov-de Haas oscillations in the self-heating regime. Applied Physics Letters, 119(22). https://doi.org/10.1063/5.0071939

MLA:

Huang, Xiangwei, et al. "Non-linear Shubnikov-de Haas oscillations in the self-heating regime." Applied Physics Letters 119.22 (2021).

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