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

Journal Article · Wed Jun 06 00:00:00 EDT 2018 · Current Applied Physics

DOI:https://doi.org/10.1016/j.cap.2018.06.005· OSTI ID:1490889

Zohar, S. ^[1]; Ryan, P. J. ^[2]; Kim, J. W. ^[2]; Keavney, D. J. ^[2]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
2. Argonne National Lab. (ANL), Argonne, IL (United States)

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 L3 edge indicating conduction band spin splitting, with differences in line width and amplitude depending on the source of spin polarization.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-76SF00515; AC02-06CH11357
• OSTI ID: 1490889
• Alternate ID(s): OSTI ID: 1477039
• Journal Information: Current Applied Physics, Vol. 18, Issue 11; ISSN 1567-1739
• Publisher: Korean Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
Spintronics
X ray magnetic circular dichroism
Spin-polarized
Carriers
Magnetic devices