Abstract
Shubnikov-de Haas and cyclotron resonance results are presented for GaInAs-AlInAs heterojunctions in both perpendicular and tilted magnetic fields. Two electric subbands are occupied in zero magnetic field. Magnetic depopulation of the higher (E 1) subband is observed in both perpendicular and tilted orientations. This enables a demonstration of the importance of intersubband scattering in both resistivity and cyclotron resonance. A shift of the relative positions of the E o and E 1 subbands by parallel magnetic fields is measured to be 0.26 meV/T 2.
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