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

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 \(5\)th Landau level and at a magnetic field lower than \(1\) T. We are able to retain t...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2018-05
Main Authors: Fauzi, M H, Noorhidayati, A, Sahdan, M F, Sato, K, Nagase, K, Hirayama, Y
Format: Article
Language:English
Subjects:
Electron states
Magnetic fields
NMR
Nuclear magnetic resonance
Nuclear spin
Point contact
Signal to noise ratio
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 \(5\)th 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 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1805.04627