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, and R. Arita
Phys. Rev. B 84, 014504 – Published 18 July 2011

Abstract

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 d3z2r2- 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.

  • Figure
  • Figure
  • Received 8 December 2010

DOI:https://doi.org/10.1103/PhysRevB.84.014504

©2011 American Physical Society

Authors & Affiliations

I. Nishi1,*, M. Ishikado2,3,4, S. Ideta1, W. Malaeb1, T. Yoshida1,4, A. Fujimori1,4, Y. Kotani5, M. Kubota5, K. Ono5, M. Yi6, D. H. Lu6, R. Moore6, Z.-X. Shen6, A. Iyo3,4, K. Kihou3,4, H. Kito3,4, H. Eisaki3,4, S. Shamoto2,4, and R. Arita7,4,8

  • 1Department of Physics and Department of Complexity Science and Engineering, University of Tokyo, Hongo, Tokyo 113-0033, Japan
  • 2Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
  • 3Nanoelectronic Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
  • 4JST, TRIP, Chiyoda, Tokyo 102-0075, Japan
  • 5Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • 6Department of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA
  • 7Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan
  • 8JST, CREST, Hongo, Tokyo 113-8656, Japan

  • *nishi@wyvern.phys.s.u-tokyo.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 84, Iss. 1 — 1 July 2011

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×