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Scanning nuclear resonance imaging of a hyperfine-coupled quantum Hall system

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  • Katsushi Hashimoto

    (Tohoku University
    Tohoku University)

  • Toru Tomimatsu

    (Tohoku University)

  • Ken Sato

    (Tohoku University)

  • Yoshiro Hirayama

    (Tohoku University
    Tohoku University)

Abstract

Nuclear resonance (NR) is widely used to detect and characterise nuclear spin polarisation and conduction electron spin polarisation coupled by a hyperfine interaction. While the macroscopic aspects of such hyperfine-coupled systems have been addressed in most relevant studies, the essential role of local variation in both types of spin polarisation has been indicated in 2D semiconductor systems. In this study, we apply a recently developed local and highly sensitive NR based on a scanning probe to a hyperfine-coupled quantum Hall (QH) system in a 2D electron gas subject to a strong magnetic field. We succeed in imaging the NR intensity and Knight shift, uncovering the spatial distribution of both the nuclear and electron spin polarisation. The results reveal the microscopic origin of the nonequilibrium QH phenomena, and highlight the potential use of our technique in microscopic studies on various electron spin systems as well as their correlations with nuclear spins.

Suggested Citation

  • Katsushi Hashimoto & Toru Tomimatsu & Ken Sato & Yoshiro Hirayama, 2018. "Scanning nuclear resonance imaging of a hyperfine-coupled quantum Hall system," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04612-y
    DOI: 10.1038/s41467-018-04612-y
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