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

Huang, X., Guo, C., Putzke, C., Diaz, J., Manna, K., Shekhar, C., et al. (2021). Non-linear Shubnikov-de Haas oscillations in the self-heating regime. Applied Physics Letters, 119(22): 224101, pp. 1-6. doi:10.1063/5.0071939.

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 Creators:
Huang, Xiangwei1, Author
Guo, Chunyu1, Author
Putzke, Carsten1, Author
Diaz, Jonas1, Author
Manna, Kaustuv2, Author              
Shekhar, Chandra3, Author              
Felser, Claudia4, Author              
Moll, Philip J. W.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 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 ?-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.& nbsp;(C) 2021 Author(s).

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Language(s): eng - English
 Dates: 2021-11-292021-11-29
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: ISI: 000729449300005
DOI: 10.1063/5.0071939
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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 119 (22) Sequence Number: 224101 Start / End Page: 1 - 6 Identifier: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223