Photoemission and core-level magnetic circular dichroism studies of diluted magnetic semiconductors

A. Fujimori, J. Okabayashi, Y. Takeda, Takashi Mizokawa, J. Okamoto, K. Mamiya, Y. Saitoh, Y. Muramatsu, M. Oshima, S. Ohya, M. Tanaka

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Abstract

An overview is given on the photoemission studies of the electronic structure of diluted magnetic semiconductors (DMS's), in particular of the prototypical ferromagnetic DMS Ga1-xMnxAs. Configuration-interaction cluster-model analyses of the photoemission data allow us to estimate the p-d exchange coupling constant and hence to predict how to increase the Curie temperature in new materials. Spectra near the Fermi level combined with the transport and optical properties suggest a highly incoherent metallic state for the ferromagnetic metallic phase. It is shown that new insight into the chemically and magnetically inhomogeneous states of DMS's can be gained by the temperature and magnetic field dependence of core-level magnetic circular dichroism signals.

Original languageEnglish
Pages (from-to)701-705
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
DOIs
Publication statusPublished - 2005 Jun
Externally publishedYes

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Keywords

  • Diluted magnetic semiconductors
  • Magnetic circular dichroism
  • Photoemission

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Fujimori, A., Okabayashi, J., Takeda, Y., Mizokawa, T., Okamoto, J., Mamiya, K., Saitoh, Y., Muramatsu, Y., Oshima, M., Ohya, S., & Tanaka, M. (2005). Photoemission and core-level magnetic circular dichroism studies of diluted magnetic semiconductors. Journal of Electron Spectroscopy and Related Phenomena, 144-147, 701-705. https://doi.org/10.1016/j.elspec.2005.01.212