Resonant photoemission of Ga1-xMnxAs at the Mn L edge

O. Rader*, C. Pampuch, A. M. Shikin, W. Gudat, J. Okabayashi, T. Mizokawa, A. Fujimori, T. Hayashi, M. Tanaka, A. Tanaka, A. Kimura

*この研究の対応する著者

研究成果: Article査読

42 被引用数 (Scopus)

抄録

Ga1-xMnxAs, x = 0.043, has been grown ex situ on GaAs(100) by low-temperature molecular-beam epitaxy. On the reprepared p(1 x 1) surface, resonant photoemission of the valence band shows a 20-fold enhancement of the Mn 3d contribution at the L3 edge. The difference spectrum is similar to our previously obtained resonant photoemission at the Mn M edge, in particular a strong satellite appears and no clear Fermi edge ruling out strong Mn 3d weight at the valence-band maximum. The x-ray absorption lineshape differs from previous publications. Our calculation based on a configuration-interaction cluster model reproduces the x-ray absorption and the L3 on-resonance photoemission spectrum for model parameters Δ, Udd, and (pdσ) consistent with our previous work and shows the same spectral shape on and off resonance thus rendering resonant photoemission measured at the L3 edge representative of the Mn 3d contribution. At the same time, the results are more bulk sensitive due to a probing depth about twice as large as for photoemission at the Mn M edge. The confirmation of our previous results obtained at the M edge calls recent photoemission results into question which report the absence of the satellite and good agreement with local-density theory.

本文言語English
論文番号075202
ページ(範囲)752021-752027
ページ数7
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
69
7
出版ステータスPublished - 2004 2
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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