Dynamic nuclear polarization at high Landau levels in a quantum point contact

M. H. Fauzi, A. Noorhidayati, M. F. Sahdan, K. Sato, K. Nagase, Y. Hirayama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We demonstrate a way to polarize and detect nuclear spin in a gate-defined quantum point contact operating at high Landau levels. Resistively detected nuclear magnetic resonance (RDNMR) can be achieved up to the fifth Landau level and at a magnetic field lower than 1 T. We are able to retain the RDNMR signals in a condition where the spin degeneracy of the first one-dimensional (1D) subband is still preserved. Furthermore, the effects of orbital motion on the first 1D subband can be made smaller than those due to electrostatic confinement. This developed RDNMR technique is a promising means to study electronic states in a quantum point contact near zero magnetic field.

Original languageEnglish
Article number201412
JournalPhysical Review B
Volume97
Issue number20
DOIs
Publication statusPublished - 2018 May 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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