Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction

Details Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction

2011-02-23

arxiv.org/abs/1102.4648v1

Journal of the Physical Society of Japan, 81, 054706 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1143/JPSJ.81.054706

A new type of blockade effect - spin-orbit blockade (SOB) - is found in the conduction of a quantum dot (QD) made of a material with spin-orbit interaction. The blockade arises from spin-filtering effect in a quantum point contact (QPC), which is a component of the QD. Hence the appearance of the blockade itself evidences the spin-filtering effect in the QPC. The lower bound of filtering efficiency is estimated to be above 80%.

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