Electron-nuclear spin interaction in edge states of quantum Hall systems

Tomoki MacHida, Tomoyuki Yamazaki, Susumu Ishizuka, Susumu Komiyama, Koji Muraki, Yohshiro Hirayama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have studied the electron-nuclear spin interaction in integer and fractional quantum- Hall edge channels. By selectively populating edge channels of different spin polarities, nuclear spins along the edge channels are dynamically polarized through the hyperfine interaction. The resultant dynamic nuclear polarization is detected with the edge-channel transport via nuclear magnetic resonance. The technique of controlling and detecting nuclear-spin polarization in quantum-Hall systems opens up new possibilities of developing nuclear-spin solid-state devices as well as shedding new light to spin properties of quantum-Hall systems. We demonstrate local controllability of the nuclear-spin polarization using a built-in micro-metal strip fabricated on a quantum-Hall device. We also demonstrate that the dynamic nuclear polarization can be utilized as a sensitive probe of the spin polarization of fractional quantum-Hall edge channels.

Original languageEnglish
Pages (from-to)44-48
Number of pages5
Journaljournal of the physical society of japan
Volume72
Issue numberSUPPL. A
DOIs
Publication statusPublished - 2003 Jan 1
Externally publishedYes

Keywords

  • Dynamic nuclear polarization
  • Edge channels
  • Quantum Hall effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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