1210.5901 (M. P. Nowak et al.)

Spin polarization anisotropy in a narrow spin-orbit-coupled nanowire
quantum dot    [PDF]

M. P. Nowak, B. Szafran

Single and two-electron systems confined in nanowire quantum dots are studied in the context of spin-orbit coupling effects. Anisotropy of the spin-orbit interaction is discussed in terms of the system geometry and orientation of the external magnetic field. We find that in the limit of strong lateral confinement the electron spin becomes well defined in spite of the presence of spin-orbit coupling. We present an analytical solution for the one-dimensional limit and study its applicability for finite thickness nanowires by comparing the results with a full three-dimensional calculation. The present results are confronted with the recent measurements of the effective Lande factor anisotropy in InSb nanowire quantum dots [S. Nadj-Perge et al., Phys. Rev. Lett. 108, 166801 (2012)].

View original: http://arxiv.org/abs/1210.5901