We have investigated the relationship between surface morphology and electronic structure of MnAs on GaAs (001) depending on the MnAs layer thickness using in situ photoemission spectroscopy. For less than 4 ML (monolayer) growth of MnAs, metallic and ferromagnetic properties were not observed due to the island growth. Valence-band photoemission spectra revealed that the localized Mn 3d states for less than 4 ML growth gradually change to the itinerant characteristics with increasing MnAs layer thickness. Core-level photoemission spectra have revealed that the Ga atoms are not segregated onto the surface and an abrupt interface is identified.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)