Large anisotropy of the spin-orbit interaction in a single InAs self-assembled quantum dot.
The anisotropy of the spin-orbit interaction (SOI) is studied for a single uncapped InAs self-assembled quantum dot holding just a few electrons. The SOI energy is evaluated from anticrossing or SOI-induced hybridization between the ground and excited states with opposite spins. The magnetic angular dependence of the SOI energy falls on an absolute cosine function for azimuthal rotation, and a cosinelike function for tilting rotation. Furthermore, the SOI energy is quenched for a specific magnetic field vector. The angular dependence of SOI is found to compare well with calculation of Rashba SOI in a two-dimensional harmonic potential.
Takahashi
S
S
Department of Applied Physics and QPEC, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. stakahashi@meso.t.u-tokyo.ac.jp
Deacon
R S
RS
Yoshida
K
K
Oiwa
A
A
Shibata
K
K
Hirakawa
K
K
Tokura
Y
Y
Tarucha
S
S