Single-hole electric dipole spin resonance at subharmonic frequencies

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Abstract
The spin of a single hole confined in a planar gated double quantum dot system is manipulated at subharmonic frequencies of the electric dipole spin resonance. This is achieved by taking advantage of the intrinsic strong spin–orbit coupling that exists in the hole system. In our experiments, a single-hole spin is initially placed in one of the quantum dots, while the other dot is kept empty. The hole spin rotations are stimulated due to multiple anti-crossing events with empty spin levels of the other dot during the Landau–Zener–Stückelberg–Majorana interference. Using this technique, we are able to excite and detect spin-flip transitions occurring at high subharmonic frequencies, up to the 12th order.

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