Electric and Magnetic Fields Effects in Vertically Coupled GaAs/AlxGa1−xAs Conical Quantum Dots

Optical anisotropy in vertically coupled quantum dots

Exciton and negative trion dissociation by an external electric field in vertically coupled quantum dots

B. Szafran,1,2 T. Chwiej,1,2 F. M. Peeters,1 S. Bednarek,2 J. Adamowski,2 and B. Partoens1 1Departement Fysica, Universiteit Antwerpen (Campus Drie Eiken), Universiteitsplein 1, B-2610 Antwerpen, Belgium 2Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland sReceived 27 July 2004; revised manuscript received 15 Nove...

Spin interactions and switching in vertically tunnel-coupled quantum dots

We determine the spin-exchange coupling J between two electrons located in two vertically tunnel-coupled quantum dots, and its variation when magnetic ~B! and electric ~E! fields ~both in-plane and perpendicular! are applied. We predict a strong decrease of J as the in-plane B field is increased, mainly due to orbital compression. Combined with the Zeeman splitting, this leads to a singlet-trip...

Drops with conical ends in electric and magnetic fields

Slender-body theory is used to determine the approximate static shape of a conically ended dielectric drop in an electric field. The shape and the electric-field distribution follow from solution of a second-order nonlinear ordinary differential equation that can be integrated numerically or analytically. An analytic formula is given for the dependence of the equilibrium cone angle on the ratio...

Singly ionized double-donor complex in vertically coupled quantum dots

The electronic states of a singly ionized on-axis double-donor complex (D2+) confined in two identical vertically coupled, axially symmetrical quantum dots in a threading magnetic field are calculated. The solutions of the Schrödinger equation are obtained by a variational separation of variables in the adiabatic limit. Numerical results are shown for bonding and antibonding lowest-lying artifi...