Trions as a probe of spin injection through II-VI magnetic/non-magnetic heterointerface

Abstract

We report on an efficient injection of spin polarized electrons from CdMgMnTe diluted magnetic semiconductor to non- magnetic CdMgTe quantum well structure. The electron spins were able to diffuse keeping their polarization memory for distances larger than 2000 Angstrom. Study of the optical properties of trions is shown to be a new, highly sensitive detection tool of spill injection. (C) 2002 Elsevier Science B.V. All rights reserved