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arXiv · 1312.4985

All-electrical time-resolved spin generation and spin manipulation in n-InGaAs

I. Stepanov·S. Kuhlen·M. Ersfeld·M. Lepsa·B. Beschoten
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Abstract

We demonstrate all-electrical spin generation and subsequent manipulation by two successive electric field pulses in an n-InGaAs heterostructure in a time-resolved experiment at zero external magnetic field. The first electric field pulse along the $[1\bar10]$ crystal axis creates a current induced spin polarization (CISP) which is oriented in the plane of the sample. The subsequent electric field pulse along [110] generates a perpendicular magnetic field pulse leading to a coherent precession of this spin polarization with 2-dimensional electrical control over the final spin orientation. Spin precession is probed by time-resolved Faraday rotation. We determine the build-up time of CISP during the first field pulse and extract the spin dephasing time and internal magnetic field strength during the spin manipulation pulse.

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I. Stepanov, S. Kuhlen, M. Ersfeld, M. Lepsa, B. Beschoten. 2013-12-17. All-electrical time-resolved spin generation and spin manipulation in n-InGaAs. https://doi.org/10.1063/1.4864468

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