Suppression of Kondo-assisted cotunneling in a spin-1 quantum dot with spin-orbit interaction

Article

关键词: EVEN NUMBER;    ELECTRONS;   

DOI  :  10.1103/PhysRevB.82.161306

来源: SCIE

【 摘 要 】

Kondo-type zero-bias anomalies have been frequently observed in quantum dots occupied by two electrons and attributed to a spin-triplet configuration that may become stable under particular circumstances. Conversely, zero-bias anomalies have been so far quite elusive when quantum dots are occupied by an even number of electrons greater than two, even though a spin-triplet configuration is more likely to be stabilized there than for two electrons. We propose as an origin of this phenomenon the spin-orbit interaction, and we show how it profoundly alters the conventional Kondo screening scenario in the simple case of a laterally confined quantum dot with four electrons.

【 授权许可】

Free