Robust strongly-modulated transmission of a $T$-shaped structure with local Rashba interaction

Details Robust strongly-modulated transmission of a $T$-shaped structure with local Rashba interaction Robust strongly-modulated transmission of a $T$-shaped structure with local Rashba interaction

2008-02-18

arxiv.org/abs/0802.2397v3

Phys. Rev. B 77, 193305 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, To be published in PRB

Scientific paper

10.1103/PhysRevB.77.193305

We propose a scheme of spin transistor using a $T$-shaped structure with local Rashba interaction. A wide antiresonance energy gap appears due to the interplay of two types of interference, the Fano-Rashba interference and the structure interference. A large current from the gap area can be obtained via changing the Rashba strength and/or the length of the sidearm by using gate voltage. The robustness of the antiresonance gap against strong disorder is demonstrated and shows the feasibility of this structure for the real application.

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