Fast-electron optical spectrum of a two-dimensional electron gas in the presence of the Rashba effect |
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| Authors: | W Xu Z Zeng F Lu C Zhang |
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| Institution: | aKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;bDepartment of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University,Canberra ACT 0200, Australia;cDepartment of Physics, Fudan University, Shanghai 200433, China;dSchool of Physics, University of Wollongong, Wollongong NSW 2522, Australia |
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| Abstract: | We examine how the Rashba spin-orbit interaction (SOI) affects the fast-electron optical spectrum of a two-dimensional electron gas (2DEG). It is found that for a spin-split 2DEG, the spectrum of optical absorption is mainly induced by plasmon excitation via inter-SO electronic transition. From the width and position of the spectrum, the Rashba spin-splitting can be identified optically and, therefore, important spintronic properties can be measured though optical experiments. |
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| Keywords: | Fast-electron optical spectrum Rashba spin-splitting Plasmon modes |
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