Electron-nuclear spin control in charged semiconductor quantum dots by electrical currents through micro-coils

Jungtaek Kim; Puls, J.; Chen, Y. S.; Bacher, G.; Henneberger, F.
April 2010
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p151908
Academic Journal
We have fabricated micrometer-sized single-turn coils on top of charged CdSe/ZnSe quantum dot heterostructures by lithographical techniques. Current injection creates magnetic fields in the some 10 mT range, strong enough to modulate the hyperfine interaction. The very low coil inductance allows for generation of fast field transients. We demonstrate local control of the resident electron spin as well as read-out of the nuclear spin state on the 10 ns time scale by electrical current pulses.


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