Optical study of electron-electron exchange interaction in CdTe/ZnTe quantum dots

Strong electron-hole exchange in coherently coupled quantum dots.

We have investigated few-body states in vertically stacked quantum dots. Because of a small interdot tunneling rate, the coupling in our system is in a previously unexplored regime where electron-hole exchange plays a prominent role. By tuning the gate bias, we are able to turn this coupling off and study a complementary regime where total electron spin is a good quantum number. The use of diff...

Asymmetric exchange between electron spins in coupled semiconductor quantum dots

Few-electron quantum dots

We review some electron transport experiments on few-electron, vertical quantum dot devices. The measurement of current versus source–drain voltage and gate voltage is used as a spectroscopic tool to investigate the energy characteristics of interacting electrons confined to a small region in a semiconducting material. Three energy scales are distinguished: the single-particle states, which are...

Electron Transport in Quantum Dots

LEO P. KOUWENHOVEN, CHARLES M. MARCUS, PAUL L. MCEUEN, SEIGO TARUCHA, ROBERT M. WESTERVELT, AND NED S. WINGREEN 6 (alphabetical order). 1. Department of Applied Physics, Delft University of Technology, P.O.Box 5046, 2600 GA Delft, The Netherlands. 2. Department of Physics, Stanford University, Stanford, CA 94305, USA 3. Department of Physics, University of California and Materials Science Divis...

Adiabatic optical entanglement between electron spins in separate quantum dots

S. K. Saikin,1,2,* C. Emary,3 D. G. Steel,4 and L. J. Sham1 1Department of Physics, University of California–San Diego, La Jolla, California 92093, USA 2Department of Physics, Kazan State University, Kazan 420008, Russian Federation 3Institut für Theoretische Physik, TU Berlin, Hardenbergstr. 36, Berlin D-10623, Germany 4Department of Physics, The University of Michigan, Ann Arbor, Michigan 481...