Ettingshausen Effect around a Landau Level Filling Factor ν=3 Studied by Dynamic Nuclear Polarization

Yosuke Komori, Satoru Sakuma, and Tohru Okamoto
Phys. Rev. Lett. 99, 146807 – Published 5 October 2007

Abstract

A spin current perpendicular to the electric current is investigated around a Landau level filling factor ν=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 ν=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.

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  • Received 13 March 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.146807

©2007 American Physical Society

Authors & Affiliations

Yosuke Komori, Satoru Sakuma, and Tohru Okamoto

  • Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

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Issue

Vol. 99, Iss. 14 — 5 October 2007

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