Abstract
A spin current perpendicular to the electric current is investigated around a Landau level filling factor in a 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 , 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.
- Received 13 March 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.146807
©2007 American Physical Society