Electrically Controllable Kondo Correlation in Spin-Orbit-Coupled Quantum Point Contacts.
Phys Rev Lett
; 128(2): 027701, 2022 Jan 14.
Article
em En
| MEDLINE
| ID: mdl-35089765
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.
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MEDLINE
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En
Ano de publicação:
2022
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Article