Two-Dimensional and Three-Dimensional Fermi Surfaces of Superconducting BaFe2(As1xPx)2 and Their Nesting Properties Revealed by Angle-Resolved Photoemission Spectroscopy

T. Yoshida, I. Nishi, S. Ideta, A. Fujimori, M. Kubota, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, H. Ikeda, and R. Arita
Phys. Rev. Lett. 106, 117001 – Published 18 March 2011

Abstract

We have studied the three-dimensional shapes of the Fermi surfaces (FSs) of BaFe2(As1xPx)2 (x=0.38), where superconductivity is induced by isovalent P substitution and by angle-resolved photoemission spectroscopy. Moderately strong electron mass enhancement has been identified for both the electron and hole FSs. Among two observed hole FSs, the nearly two-dimensional one shows good nesting with the outer two-dimensional electron FS, but its orbital character is different from the outer electron FS. The three-dimensional hole FS shows poor nesting with the electron FSs. The present results suggest that the three dimensionality and the difference in the orbital character weaken FS nesting while partial nesting among the outer electron FSs of dxy character and/or that within the three-dimensional hole FS becomes dominant, which may lead to the nodal superconductivity.

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  • Received 12 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.117001

© 2011 American Physical Society

Authors & Affiliations

T. Yoshida1,2, I. Nishi1, S. Ideta1, A. Fujimori1,2, M. Kubota3, K. Ono3, S. Kasahara4,5, T. Shibauchi5, T. Terashima4, Y. Matsuda5, H. Ikeda2,5, and R. Arita2,6

  • 1Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • 2Transformative Research-Project on Iron Pnictides (TRIP), JST, Chiyoda, Tokyo 102-0075, Japan
  • 3KEK, Photon Factory, Tsukuba, Ibaraki 305-0801, Japan
  • 4Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan
  • 5Department of Physics, Kyoto University, Kyoto 606-8502, Japan
  • 6Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-8561, Japan

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Issue

Vol. 106, Iss. 11 — 18 March 2011

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