Ettingshausen effect around a Landau level filling factor nu = 3 studied by dynamic nuclear polarization

A spin current perpendicular to the electric current is investigated around a Landau level filling factor nu=3 in a GaAs/AlGaAs two-dimensional electron system. Measurements of dynamic nuclear polarization in the vicinity of the edge of a specially designed Hall bar sample indicate that the directio...

Full description

Saved in:
Bibliographic Details
Published inPhysical review letters Vol. 99; no. 14; p. 146807
Main Authors Komori, Yosuke, Sakuma, Satoru, Okamoto, Tohru
Format Journal Article
LanguageEnglish
Published United States 05.10.2007
Online AccessGet more information

Cover

More Information
Summary:A spin current perpendicular to the electric current is investigated around a Landau level filling factor nu=3 in a GaAs/AlGaAs two-dimensional electron system. Measurements of dynamic nuclear polarization in the vicinity of the edge of a specially designed Hall bar sample indicate that the direction of the spin current with respect to the Hall electric field reverses its polarity at nu=3, where the dissipative current carried by holes in the spin up Landau level is replaced with that by electrons in the spin down Landau level.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.99.146807