Networks of quantum nanorings: programmable spintronic devices

Details Networks of quantum nanorings: programmable spintronic devices Networks of quantum nanorings: programmable spintronic devices

2008-08-12

arxiv.org/abs/0808.1632v1

Nano Lett. 8 (8), 2556 (2008).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, accepted by Nano Letters

Scientific paper

10.1021/nl801858a

An array of quantum rings with local (ring by ring) modulation of the spin orbit interaction (SOI) can lead to novel effects in spin state transformation of electrons. It is shown that already small (3x3, 5x5) networks are remarkably versatile from this point of view: Working in a given network geometry, the input current can be directed to any of the output ports, simply by changing the SOI strengths by external gate voltages. Additionally, the same network with different SOI strengths can be completely analogous to the Stern-Gerlach device, exhibiting spatial-spin entanglement.

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