Year: 2007
Type: article
Abstract: A method for local dynamic nuclear polarization is demonstrated in a GaAs∕AlGaAs heterostructure at the Landau level filling factor ν=3. Using a narrow channel sample, where the width varies stepwise along the electron flow, the authors find that electron cooling (heating) causes the polarization of nuclear spins against (toward) the external magnetic field at liquid helium temperatures. The longitudinal nuclear spin relaxation rate varies exponentially with inverse temperature.
Source: Applied Physics Letters
DOI: 10.1063/1.2431779
Authors: Yosuke Komori, Tohru Okamoto
Institution: The University of Tokyo
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2046351670