Spin control in semiconductor quantum wires: Rashba and Dresselhaus interaction

Abstract

Conselleria d’Educaci´o i Cultura, E-07004 Palma de Mallorca, Spain(Dated: November 30, 2008)We show that spin-flip rotation in a semiconductor quantum wire, caused by the Rashba andthe Dresselhaus interactions (both of arbitrary strengths), can be suppressed by dint of an in-planemagnetic field. We found a new type of symmetry, which arises at a particular set of intensity andorientation of the magnetic field and explains this suppression. Based on our findings, we proposea transport experiment to measure the strengths of the Rashba and the Dresselhaus interactions.