Nodal gap structure of superconducting BaFe2(As 1-xPx)2 from angle-resolved thermal conductivity in a magnetic field

M. Yamashita; Y. Senshu; T. Shibauchi; S. Kasahara; K. Hashimoto; D. Watanabe; H. Ikeda; T. Terashima; I. Vekhter; A. B. Vorontsov; Y. Matsuda

doi:10.1103/PhysRevB.84.060507

Nodal gap structure of superconducting BaFe₂(As _1-xP_x)₂ from angle-resolved thermal conductivity in a magnetic field

M. Yamashita, Y. Senshu, T. Shibauchi, S. Kasahara, K. Hashimoto, D. Watanabe, H. Ikeda, T. Terashima, I. Vekhter, A. B. Vorontsov, Y. Matsuda

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85 Citations (Scopus)

Abstract

The structure of the superconducting order parameter in the iron-pnictide superconductor BaFe₂(As_0.67P_0.33)₂ (T_c=31 K) with line nodes is studied by the angle-resolved thermal conductivity measurements in a magnetic field rotated within the basal plane. We find that the thermal conductivity displays distinct fourfold oscillations with minima when the field is directed at ±45 with respect to the tetragonal a axis. We discuss possible gap structures that can account for the data, and conclude that the observed results are most consistent with the closed nodal loops located at the flat parts of the electron Fermi surface with high Fermi velocity.

Original language	English
Article number	060507
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.84.060507
Publication status	Published - Aug 18 2011
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.84.060507

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Yamashita, M., Senshu, Y., Shibauchi, T., Kasahara, S., Hashimoto, K., Watanabe, D., Ikeda, H., Terashima, T., Vekhter, I., Vorontsov, A. B., & Matsuda, Y. (2011). Nodal gap structure of superconducting BaFe₂(As _1-xP_x)₂ from angle-resolved thermal conductivity in a magnetic field. Physical Review B - Condensed Matter and Materials Physics, 84(6), Article 060507. https://doi.org/10.1103/PhysRevB.84.060507

Yamashita, M, Senshu, Y, Shibauchi, T, Kasahara, S, Hashimoto, K, Watanabe, D, Ikeda, H, Terashima, T, Vekhter, I, Vorontsov, AB & Matsuda, Y 2011, 'Nodal gap structure of superconducting BaFe₂(As _1-xP_x)₂ from angle-resolved thermal conductivity in a magnetic field', Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 6, 060507. https://doi.org/10.1103/PhysRevB.84.060507

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abstract = "The structure of the superconducting order parameter in the iron-pnictide superconductor BaFe2(As0.67P0.33)2 (Tc=31 K) with line nodes is studied by the angle-resolved thermal conductivity measurements in a magnetic field rotated within the basal plane. We find that the thermal conductivity displays distinct fourfold oscillations with minima when the field is directed at ±45 with respect to the tetragonal a axis. We discuss possible gap structures that can account for the data, and conclude that the observed results are most consistent with the closed nodal loops located at the flat parts of the electron Fermi surface with high Fermi velocity.",

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AU - Yamashita, M.

AU - Senshu, Y.

AU - Shibauchi, T.

AU - Kasahara, S.

AU - Hashimoto, K.

AU - Watanabe, D.

AU - Ikeda, H.

AU - Terashima, T.

AU - Vekhter, I.

AU - Vorontsov, A. B.

AU - Matsuda, Y.

PY - 2011/8/18

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N2 - The structure of the superconducting order parameter in the iron-pnictide superconductor BaFe2(As0.67P0.33)2 (Tc=31 K) with line nodes is studied by the angle-resolved thermal conductivity measurements in a magnetic field rotated within the basal plane. We find that the thermal conductivity displays distinct fourfold oscillations with minima when the field is directed at ±45 with respect to the tetragonal a axis. We discuss possible gap structures that can account for the data, and conclude that the observed results are most consistent with the closed nodal loops located at the flat parts of the electron Fermi surface with high Fermi velocity.

AB - The structure of the superconducting order parameter in the iron-pnictide superconductor BaFe2(As0.67P0.33)2 (Tc=31 K) with line nodes is studied by the angle-resolved thermal conductivity measurements in a magnetic field rotated within the basal plane. We find that the thermal conductivity displays distinct fourfold oscillations with minima when the field is directed at ±45 with respect to the tetragonal a axis. We discuss possible gap structures that can account for the data, and conclude that the observed results are most consistent with the closed nodal loops located at the flat parts of the electron Fermi surface with high Fermi velocity.

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Nodal gap structure of superconducting BaFe₂(As _1-xP_x)₂ from angle-resolved thermal conductivity in a magnetic field

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