J. Konemann, R. J. Haug, D. K. Maude, V. I. Fal'ko, B. L. Altshuler
Published 2004-09-02Version 1
In lateral quantum dots, the combined effect of both Dresselhaus and Bychkov-Rashba spin orbit coupling is equivalent to an effective magnetic field B_so which has the opposite sign for s_z=1/2 spin electrons. When the external magnetic field is perpendicular to the planar structure, the field B_so generates an additional splitting for electron states as compared to the spin splitting in the in-plane field orientation. The anisotropy of spin splitting has been measured and then analyzed in terms of spin-orbit coupling in several AlGaAs/GaAs quantum dots by means of resonanat tunneling spectroscopy. From the measured values and sign of the anisotropy we are able to determine the dominating spin-orbit coupling mechanism.
Journal: Phys. Rev. Lett. 94, 226404 (2005)
Anisotropy of spin splitting and spin relaxation in lateral quantum dots
Spin splitting and precession in quantum dots with spin-orbit coupling: the role of spatial deformation
Para-ortho transition of artificial H$_2$ molecule in lateral quantum dots doped with magnetic impurities
