Photoemission and X-ray absorption studies of the electronic structure of GaN-based diluted magnetic semiconductors

J. I. Hwang, Y. Ishida, M. Kobayashi, Y. Osafune, T. Mizokawa, A. Fujimori, Y. Takeda, K. Terai, S. I. Fujimori, Y. Saitoh, Y. Muramatsu, A. Tanaka, T. Kondo, H. Munekata, M. Hashimoto, H. Tanaka, S. Hasegawa, H. Asahi

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Abstract

We have investigated the electronic structure of Cr- and Mn-doped GaN using photoemission spectros-copy (PES) and X-ray absorption spectroscopy (XAS). Cr and Mn XAS at the L-edge have indicated that the Cr and Mn ions are in the tetrahedral crystal field and that their valences are trivalent and divalent, respectively. Upon Cr and Mn doping into GaN, new states were found to form in the band-gap region of GaN. Resonant photoemission spectroscopy (RPES) has revealed that the main structure of the Cr 3d partial density of states (PDOS) appears within the band gap of GaN while that of the Mn 3d PDOS appears within the valence band of GaN and as a shoulder above the valence-band maximum of GaN, indicating that the character of the doping-induced states is different between Ga1-xCrxN and Ga1-xMnxN.

Original languageEnglish
Pages (from-to)1696-1700
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume243
Issue number7
DOIs
Publication statusPublished - 2006 Jun

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Hwang, J. I., Ishida, Y., Kobayashi, M., Osafune, Y., Mizokawa, T., Fujimori, A., Takeda, Y., Terai, K., Fujimori, S. I., Saitoh, Y., Muramatsu, Y., Tanaka, A., Kondo, T., Munekata, H., Hashimoto, M., Tanaka, H., Hasegawa, S., & Asahi, H. (2006). Photoemission and X-ray absorption studies of the electronic structure of GaN-based diluted magnetic semiconductors. Physica Status Solidi (B) Basic Research, 243(7), 1696-1700. https://doi.org/10.1002/pssb.200565329