Spin-orbit coupling and anisotropy of spin splitting in quantum dots
Mesoscale and Nanoscale Physics
2009-11-10 v1 Materials Science
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0409054,
title = {Spin-orbit coupling and anisotropy of spin splitting in quantum dots},
author = {J. Konemann and R. J. Haug and D. K. Maude and V. I. Fal'ko and B. L. Altshuler},
journal= {arXiv preprint arXiv:cond-mat/0409054},
year = {2009}
}