Electrically Controllable Kondo Correlation in Spin-Orbit-Coupled Quantum Point Contacts

Luke W. Smith, Hong Bin Chen, Che Wei Chang, Chien Wei Wu, Shun Tsung Lo, Shih Hsiang Chao, I. Farrer, H. E. Beere, J. P. Griffiths, G. A.C. Jones, D. A. Ritchie, Yueh Nan Chen, Tse Ming Chen

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number027701
JournalPhysical review letters
Volume128
Issue number2
DOIs
Publication statusPublished - 2022 Jan 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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