Quasi-Two-Dimensional Fermi Surfaces and Coherent Interlayer Transport in KFe2As2

M. Kimata, T. Terashima, N. Kurita, H. Satsukawa, A. Harada, K. Kodama, A. Sato, M. Imai, K. Kihou, C. H. Lee, H. Kito, H. Eisaki, A. Iyo, T. Saito, H. Fukazawa, Y. Kohori, H. Harima, and S. Uji
Phys. Rev. Lett. 105, 246403 – Published 8 December 2010

Abstract

We report the results of the angular-dependent magnetoresistance oscillations (AMROs), which can determine the shape of bulk Fermi surfaces (FSs) in quasi-two-dimensional (Q2D) systems, in a highly hole-doped Fe-based superconductor KFe2As2 with Tc3.7K. From the AMROs, we determined the two Q2D FSs with rounded-square cross sections, correspond to 12% and 17% of the first Brillouin zone. The rounded-squared shape of the FS cross section is also confirmed by the analyses of the interlayer transport under in-plane fields. From the obtained FS shape, we infer the character of the 3d orbitals that contribute to the FSs.

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  • Received 2 June 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.246403

The American Physical Society

Authors & Affiliations

M. Kimata1,6,*, T. Terashima1,6, N. Kurita1,6, H. Satsukawa1, A. Harada1, K. Kodama1,2, A. Sato1,6, M. Imai1,6, K. Kihou3,6, C. H. Lee3,6, H. Kito3,6, H. Eisaki3,6, A. Iyo3,6, T. Saito4, H. Fukazawa4,6, Y. Kohori4,6, H. Harima5,6, and S. Uji1,2,6

  • 1National Institute for Materials Science, Tsukuba, Ibaraki 305-0003, Japan
  • 2Graduate School of Pure and Applied Science, University of Tsukuba, Ibaraki 305-8577, Japan
  • 3National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568 Japan
  • 4Department of Physics, Chiba University, Chiba 263-8522, Japan
  • 5Department of Physics, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501 Japan
  • 6JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan

  • *Present address: Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.

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Vol. 105, Iss. 24 — 10 December 2010

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