Spin-Spin Interaction In Artificial Molecules With In-Plane Magnetic Field

Details Spin-Spin Interaction In Artificial Molecules With In-Plane Magnetic Field Spin-Spin Interaction In Artificial Molecules With In-Plane Magnetic Field

2004-05-10

arxiv.org/abs/cond-mat/0405186v1

Physica E 22, 482 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Proc. of EP2DS-15, Nara, Japan - 6 pages, 4 figures

Scientific paper

10.1016/j.physe.2003.12.050

We investigate theoretically the spin-spin interaction of two-electrons in vertically coupled QDs as a function of the angle between magnetic field and growth axis. Our numerical approach is based on a real-space description of single-particle states in realistic samples and exact diagonalization of carrier-carrier Coulomb interaction. In particular, the effect of the in-plane field component on tunneling and, therefore, spin-spin interaction will be discussed; the singlet-triplet phase diagram as a function of the field strength and direction is drawn.

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