Direct Observation of Interband Spin-Orbit Coupling in a Two-Dimensional Electron System

Details Direct Observation of Interband Spin-Orbit Coupling in a Two-Dimensional Electron System Direct Observation of Interband Spin-Orbit Coupling in a Two-Dimensional Electron System

2012-03-28

arxiv.org/abs/1203.6190v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report the direct observation of interband spin-orbit (SO) coupling in a two-dimensional (2D) surface electron system, in addition to the anticipated Rashba spin splitting. Using angle-resolved photoemission experiments and first-principles calculations on Bi/Ag/Au heterostructures we show that the effect strongly modifies the dispersion as well as the orbital and spin character of the 2D electronic states, thus giving rise to considerable deviations from the Rashba model. The strength of the interband SO coupling is tuned by the thickness of the thin film structures.

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