Probing Fermi surface parity with spin resolved transverse magnetic focussing

Measurements of the Fermi surface are a fundamental technique for determining the electrical and magnetic properties of solids. In 2D systems, the area and diameter of the Fermi surface is typically measured using Shubnikov-de Haas oscillations and commensurability oscillations respectively. However...

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Bibliographic Details
Published inarXiv.org
Main Authors Rendell, M J, Liles, S D, Bladwell, S, Srinivasan, A, Klochan, O, Farrer, I, Ritchie, D A, Sushkov, O P, Hamilton, A R
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 07.03.2024
Subjects
Change detection
Diameters
Fermi surfaces
Magnetic properties
Oscillations
Parity
Physics - Mesoscale and Nanoscale Physics
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Summary:Measurements of the Fermi surface are a fundamental technique for determining the electrical and magnetic properties of solids. In 2D systems, the area and diameter of the Fermi surface is typically measured using Shubnikov-de Haas oscillations and commensurability oscillations respectively. However, these techniques are unable to detect changes in the parity of the Fermi surface (i.e. when +k \(\neq\) -k). Here, we show that transverse magnetic focussing can be used to detect such changes, because focussing only measures a well defined section of the Fermi surface and does not average over +k and -k. Furthermore, our results show that focussing is an order of magnitude more sensitive to changes in the Fermi surface than other 2D techniques, and could be used to investigate similar Fermi surface changes in other 2D systems.
ISSN:2331-8422
DOI:10.48550/arxiv.2310.04005