Author/Authors :
Weber، نويسنده , , W. and Seidl، نويسنده , , S. A. Bel’kov، نويسنده , , V.V. and Golub، نويسنده , , L.E. and Danilov، نويسنده , , S.N. and Ivchenko، نويسنده , , E.L. and Prettl، نويسنده , , W. and Kvon، نويسنده , , Z.D. and Cho، نويسنده , , Hyun-Ick and Lee، نويسنده , , Jung-Hee and Ganichev، نويسنده , , S.D.، نويسنده ,
Abstract :
Magneto-gyrotropic photogalvanic and spin-galvanic effects are observed in (0001)-oriented GaN/AlGaN heterojunctions excited by terahertz radiation. We show that free-carrier absorption of linearly or circularly polarized terahertz radiation in low-dimensional structures causes an electric photocurrent in the presence of an in-plane magnetic field. Microscopic mechanisms of these photocurrents based on spin-related phenomena are discussed. Properties of the magneto-gyrotropic and spin-galvanic effects specific for hexagonal heterostructures are analyzed.
