Abstract
Integrating the Kondo correlation and spin-orbit interactions, each of which have individually offered unprecedented means to manipulate electron spins, in a controllable way can open up new possibilities for spintronics. We demonstrate electrical control of the Kondo correlation by coupling the bound spin to leads with tunable Rashba spin-orbit interactions, realized in semiconductor quantum point contacts. We observe a transition from single to double peak zero-bias anomalies in nonequilibrium transport—the manifestation of the Kondo effect—indicating a controlled Kondo spin reversal using only spin-orbit interactions. Universal scaling of the Kondo conductance is demonstrated, implying that the spin-orbit interactions could enhance the Kondo temperature. A theoretical model based on quantum master equations is also developed to calculate the nonequilibrium quantum transport.
- Received 15 June 2021
- Accepted 2 December 2021
DOI:https://doi.org/10.1103/PhysRevLett.128.027701
© 2022 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Electrically Controlling the Kondo Effect
Published 10 January 2022
Spin-polarized electrons can suppress the experimental signature of the quantum many-body phenomenon known as the Kondo effect.
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