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http://dx.doi.org/10.1016/j.cap.2018.06.005

Spin-polarization and x-ray magnetic circular dichroism in GaAs  

Zohar, S. (Linac Coherent Light Source, SLAC National Accelerator Laboratory)
Ryan, P.J. (Advanced Photon Source, Argonne National Laboratory)
Kim, J.W. (Advanced Photon Source, Argonne National Laboratory)
Keavney, D.J. (Advanced Photon Source, Argonne National Laboratory)
Publication Information
Current Applied Physics / v.18, no.11, 2018 , pp. 1182-1184 More about this Journal
Abstract
The combination of angular spin momentum with electronics is a promising successor to charge-based electronics. The conduction bands in GaAs may become spin-polarized via optical spin pumping, doping with magnetic ions, or induction of a moment with an external magnetic field. We investigated the spin populations in GaAs with x-ray magnetic circular dichroism for each of these three cases. We find strong anti-symmetric lineshapes at the Ga $L_3$ edge indicating conduction band spin splitting, with differences in line width and amplitude depending on the source of spin polarization.
Keywords
Spintronics; X ray magnetic circular dichroism; Spin-polarized; Carriers; Magnetic devices;
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