Two- and Three-Dimensional Fermi Surfaces and their Nesting Properties in Superconducting BaFe2(As1-xPx)2

T. Yoshida; I. Nishi; S. Ideta; A. Fujimori; M. Kubota; K. Ono; S. Kasahara; T. Shibauchi; T. Terashima; Y. Matsuda; H. Ikeda; R. Arita

doi:10.1103/physrevlett.106.117001

arXiv · 1008.2080

Two- and Three-Dimensional Fermi Surfaces and their Nesting Properties in Superconducting BaFe2(As1-xPx)2

T. Yoshida·I. Nishi·S. Ideta·A. Fujimori·M. Kubota·K. Ono·S. Kasahara·T. Shibauchi·T. Terashima·Y. Matsuda·H. Ikeda·R. Arita

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Abstract

We have studied the three-dimensional shapes of the Fermi surfaces (FSs) of BaFe2(As1-xPx)2 (x=0.38), where superconductivity is induced by isovalent P substitution, 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, leaving partial nesting among the outer electron FSs of dxy character and/or that within the three-dimensional hole FS, which may lead to the nodal superconductivity.

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T. Yoshida, I. Nishi, S. Ideta, A. Fujimori, M. Kubota, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, H. Ikeda, R. Arita. 2010-08-12. Two- and Three-Dimensional Fermi Surfaces and their Nesting Properties in Superconducting BaFe2(As1-xPx)2. https://doi.org/10.1103/physrevlett.106.117001

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