Publication Date:
2016-03-08
Description:
Author(s): P. Andreakou, A. V. Mikhailov, S. Cronenberger, D. Scalbert, A. Nalitov, A. V. Kavokin, M. Nawrocki, L. V. Butov, K. L. Campman, A. C. Gossard, and M. Vladimirova Exciton spin lifetimes in semiconductor quantum wells are usually short and decrease when magnetic field is applied in the plane of the structure. The authors here have discovered that in coupled semiconductor quantum wells, the spin lifetime dependence on magnetic field is quite unusual. It strongly increases at low magnetic fields, then saturates and decreases at higher fields. This behavior is a consequence of mixing between direct and indirect exciton states, via the magnetic quantum confined Stark effect. This effect can be a convenient tool for exciton spin engineering, and may complement the traditional quantum confined Stark effect in structures where inhomogeneity is important. [Phys. Rev. B 93, 115410] Published Tue Mar 08, 2016
Keywords:
Surface physics, nanoscale physics, low-dimensional systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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