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arXiv · 1907.01312

Non-linear spin filter for non-magnetic materials at zero magnetic field

E. Marcellina·A. Srinivasan·F. Nichele·P. Stano·D. A. Ritchie·I. Farrer·Dimitrie Culcer·A. R. Hamilton
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Abstract

The ability to convert spin accumulation to charge currents is essential for applications in spintronics. In semiconductors, spin-to-charge conversion is typically achieved using the inverse spin Hall effect or using a large magnetic field. Here we demonstrate a general method that exploits the non-linear interactions between spin and charge currents to perform all-electrical, rapid and non-invasive detection of spin accumulation without the need for a magnetic field. We demonstrate the operation of this technique with ballistic GaAs holes as a model system with strong spin-orbit coupling, in which a quantum point contact provides the non-linear energy filter. This approach is generally applicable to electron and hole systems with strong spin orbit coupling.

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E. Marcellina, A. Srinivasan, F. Nichele, P. Stano, D. A. Ritchie, I. Farrer, Dimitrie Culcer, A. R. Hamilton. 2020-10-22. Non-linear spin filter for non-magnetic materials at zero magnetic field. https://doi.org/10.1103/physrevb.102.140406

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