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Phys Rev Lett. 2011 Aug 26;107(9):096802. Epub 2011 Aug 25.

Large tunable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3.

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1
School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife KY16 9SS, United Kingdom.

Abstract

We report a Rashba spin splitting of a two-dimensional electron gas in the topological insulator Bi(2)Se(3) from angle-resolved photoemission spectroscopy. We further demonstrate its electrostatic control, and show that spin splittings can be achieved which are at least an order-of-magnitude larger than in other semiconductors. Together these results show promise for the miniaturization of spintronic devices to the nanoscale and their operation at room temperature.

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