Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison with LaFePO

I. Nishi, M. Ishikado, S. Ideta, W. Malaeb, T. Yoshida, A. Fujimori, Y. Kotani, M. Kubota, K. Ono, M. Yi, D. H. Lu, R. Moore, Z. X. Shen, A. Iyo, K. Kihou, H. Kito, H. Eisaki, S. Shamoto, R. Arita

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of the iron-based superconductor PrFeAsO0.7 and examined the Fermi surfaces and band dispersions near the Fermi level. Heavily hole-doped electronic states have been observed due to the polar nature of the cleaved surfaces. Nevertheless, we have found that the ARPES spectra basically agree with band dispersions calculated in the local density approximation (LDA) if the bandwidth is reduced by a factor of ~2.5 and then the chemical potential is lowered by ~70 meV. Comparison with previous ARPES results on LaFePO reveals that the energy positions of the d3z2-r2- and dyz,zx- derived bands are considerably different between the two materials, which we attribute to the different pnictogen height as predicted by the LDA calculation.

原文English
文章編號014504
期刊Physical Review B - Condensed Matter and Materials Physics
84
發行號1
DOIs
出版狀態Published - 2011 七月 11

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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