Journal
PHYSICAL REVIEW B
Volume 103, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.195306
Keywords
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Funding
- Russian Science Foundation [17-12-01265]
- Russian Science Foundation [20-12-18026, 17-12-01265] Funding Source: Russian Science Foundation
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In this study, it was found that the charge density of 2D electrons can significantly affect the Dresselhaus interaction in symmetric quantum wells. By internal electric field renormalization, this effect may play an important role in quantitative studies of spin-dependent phenomena in quantum wells.
The spin-orbit interaction of two-dimensional (2D) electrons in semiconductor quantum wells gives rise to a variety of interesting transport and optical spin-dependent effects. In the GaAs/AlGaAs type heterosystems, this interaction consists of the isotropic Bychkov-Rashba term, which is absent in symmetric wells, and the anisotropic Dresselhaus term, reflecting the lattice symmetry. It is well-known that the first term can be controlled by electric fields in the growth direction: external or internal, induced by a charge density of 2D electrons. In this work we reveal that the 2D electron charge can substantially affect also the Dresselhaus interaction in symmetric quantum wells. Within the one-band electron Hamiltonian containing, together with the bulk Dresselhaus interaction, the two contributions to the Dresselhaus term from the quantum well interfaces, we show that the internal electric field from the 2D electron charge density can substantially renormalize the anisotropic spin-orbit interaction of 2D electrons. This effect may be important in quantitative studies of spin-dependent phenomena in quantum wells.
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