Gigahertz electron spin manipulation using voltage-controlled g-tensor modulation.
We present a scheme that enables gigahertz-bandwidth three-dimensional control of electron spins in a semiconductor heterostructure with the use of a single voltage signal. Microwave modulation of the Landé g tensor produces frequency-modulated electron spin precession. Driving at the Larmor frequency results in g-tensor modulation resonance, which is functionally equivalent to electron spin resonance but without the use of time-dependent magnetic fields. These results provide proof of the concept that quantum spin information can be locally manipulated with the use of high-speed electrical circuits.
Kato
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Y
Center for Spintronics and Quantum Computation, University of California, Santa Barbara, CA 93106, USA.
Myers
R C
RC
Driscoll
D C
DC
Gossard
A C
AC
Levy
J
J
Awschalom
D D
DD