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arXiv · 1608.07718

Alternative interpretation of the recent experimental results of angle-resolved photoemission spectroscopy on GaMnAs [Sci. Rep. 6, 27266 (2016)]

Masaki Kobayashi·Shinobu Ohya·Iriya Muneta·Yukiharu Takeda·Yoshihisa Harada·Juraj Krempasky·Thorsten Schmitt·Masaharu Oshima·Vladimir N. Strocov·Masaaki Tanaka·Atsushi Fujimori
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Abstract

Clarification of the position of the Fermi level ($E_\mathrm{F}$) is important in understanding the origin of ferromagnetism in the prototypical ferromagnetic semiconductor Ga$_{1-x}$Mn$_x$As (GaMnAs). In a recent publication, Souma $et$ $al$. [Sci. Rep. $\mathbf{6}$, 27266 (2016)], have investigated the band structure and the $E_\mathrm{F}$ position of GaMnAs using angle-resolved photoemission spectroscopy (ARPES), and concluded that $E_\mathrm{F}$ is located in the valence band (VB). However, this conclusion contradicts a number of recent experimental results for GaMnAs, which showed that $E_\mathrm{F}$ is located above the VB maximum in the impurity band (IB). Here, we show an alternative interpretation of their ARPES experiments, which is consistent with those recent experiments and supports the picture that $E_\mathrm{F}$ is located above the VB maximum in the IB.

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Masaki Kobayashi, Shinobu Ohya, Iriya Muneta, Yukiharu Takeda, Yoshihisa Harada, Juraj Krempasky, Thorsten Schmitt, Masaharu Oshima, Vladimir N. Strocov, Masaaki Tanaka, Atsushi Fujimori. 2016-08-27. Alternative interpretation of the recent experimental results of angle-resolved photoemission spectroscopy on GaMnAs [Sci. Rep. 6, 27266 (2016)]. https://arxiv.org/abs/1608.07718

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