Effect of strong localization of doped holes in angle-resolved photoemission spectra of La₁₋ₓSrₓFeO₃
Wadati, H. · Chikamatsu, A. · Takizawa, M. · Hashimoto, R. · Kumigashira, H. · Yoshida, T. · Mizokawa, T. · Fujimori, A. · Oshima, M. · Lippmaa, M. · Kawasaki, M. · Koinuma, H.
Original · EN
We have performed an angle-resolved photoemission spectroscopy study of La₀.₆Sr₀.₄FeO₃ using in situ prepared thin films and determined its band structure. The experimental band dispersions could be well explained by an empirical band structure assuming the G-type antiferromagnetic state. However, the Fe 3d bands were found to be shifted downward relative to the Fermi level (EF) by 1 eV compared with the calculation and to form a (pseudo)gap of 1 eV at EF. We attribute this observation to a strong localization effect of doped holes due to polaron formation.
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