The optical properties of GaAs:Co

✍ Scribed by J. M. Baranowski; M. Grynberg; E. M. Magerramov

• Book ID: 104543309
• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 315 KB
• Volume: 50
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220500202

✦ Synopsis

Abstract

The absorption due to optical transitions from the valence band to empty cobalt‐acceptor states in GaAs has been investigated. The results are well explained in terms of Lucovsky's model, and the hole ionization energy of 0.14 eV was determined. The crystal‐field spectrum of the 3d^7^ configuration is observed when the acceptor states are filled by electrons from shallow donors. The experimental results indicate that the acceptor state is due to hole in 3d‐shell of the cobalt impurity on substitutional gallium sites.