Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2

T. Yoshida; S. Ideta; T. Shimojima; W. Malaeb; K. Shinada; H. Suzuki; I. Nishi; A. Fujimori; K. Ishizaka; S. Shin; Y. Nakashima; H. Anzai; M. Arita; A. Ino; H. Namatame; M. Taniguchi; H. Kumigashira; K. Ono; S. Kasahara; T. Shibauchi; T. Terashima; Y. Matsuda; M. Nakajima; S. Uchida; Y. Tomioka; T. Ito; K. Kihou; C. H. Lee; A. Iyo; H. Eisaki; H. Ikeda; R. Arita; T. Saito; S. Onari; H. Kontani

doi:10.1038/srep07292

Anisotropy of the superconducting gap in the iron-based superconductor BaFe₂(As_1-xPx)₂

T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb, K. Shinada, H. Suzuki, I. Nishi, A. Fujimori, K. Ishizaka, S. Shin, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, H. Kumigashira, K. Ono, S. Kasahara, T. ShibauchiT. Terashima, Y. Matsuda, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, H. Ikeda, R. Arita, T. Saito, S. Onari, H. Kontani

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Abstract

We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe₂(As_1-xPx)₂ (x=0.30, T_c=30K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with modified s± gap with nodal loops. We have shown that the complicated gap modulation can be theoretically reproduced by considering both spin and orbital fluctuations.

Original language	English
Article number	7292
Journal	Scientific reports
Volume	4
DOIs	https://doi.org/10.1038/srep07292
Publication status	Published - 2014 Dec 3
Externally published	Yes

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Yoshida, T., Ideta, S., Shimojima, T., Malaeb, W., Shinada, K., Suzuki, H., Nishi, I., Fujimori, A., Ishizaka, K., Shin, S., Nakashima, Y., Anzai, H., Arita, M., Ino, A., Namatame, H., Taniguchi, M., Kumigashira, H., Ono, K., Kasahara, S., ... Kontani, H. (2014). Anisotropy of the superconducting gap in the iron-based superconductor BaFe₂(As_1-xPx)₂. Scientific reports, 4, [7292]. https://doi.org/10.1038/srep07292

Yoshida, T, Ideta, S, Shimojima, T, Malaeb, W, Shinada, K, Suzuki, H, Nishi, I, Fujimori, A, Ishizaka, K, Shin, S, Nakashima, Y, Anzai, H, Arita, M, Ino, A, Namatame, H, Taniguchi, M, Kumigashira, H, Ono, K, Kasahara, S, Shibauchi, T, Terashima, T, Matsuda, Y, Nakajima, M, Uchida, S, Tomioka, Y, Ito, T, Kihou, K, Lee, CH, Iyo, A, Eisaki, H, Ikeda, H, Arita, R, Saito, T, Onari, S & Kontani, H 2014, 'Anisotropy of the superconducting gap in the iron-based superconductor BaFe₂(As_1-xPx)₂', Scientific reports, vol. 4, 7292. https://doi.org/10.1038/srep07292

@article{6183ac1e83f04db58af7c1bbdf3ba21b,

title = "Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2",

abstract = "We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As1-xPx)2 (x=0.30, Tc=30K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with modified s± gap with nodal loops. We have shown that the complicated gap modulation can be theoretically reproduced by considering both spin and orbital fluctuations.",

author = "T. Yoshida and S. Ideta and T. Shimojima and W. Malaeb and K. Shinada and H. Suzuki and I. Nishi and A. Fujimori and K. Ishizaka and S. Shin and Y. Nakashima and H. Anzai and M. Arita and A. Ino and H. Namatame and M. Taniguchi and H. Kumigashira and K. Ono and S. Kasahara and T. Shibauchi and T. Terashima and Y. Matsuda and M. Nakajima and S. Uchida and Y. Tomioka and T. Ito and K. Kihou and Lee, {C. H.} and A. Iyo and H. Eisaki and H. Ikeda and R. Arita and T. Saito and S. Onari and H. Kontani",

note = "Funding Information: We are grateful to K. Kuroki and D.L. Feng for enlightening discussions. This work was supported by a Grant-in-Aid for Scientific Research on Innovative Area {\textquoteleft}{\textquoteleft}Materials Design through Computics: Complex Correlation and Non-Equilibrium Dynamics{\textquoteright}{\textquoteright} from MEXT, the Japan-China-Korea A3 Foresight Program and a Grant-in-Aid for Young Scientist (B) (22740221) from the Japan Society for the Promotion of Science. ARPES experiments were carried out at HiSOR (Proposal No. 10-B-27 and 11-B-1) and Photon Factory (Proposal No. 2009S2-005, No. 2012S2-001, and No. 2012G075).",

year = "2014",

month = dec,

day = "3",

doi = "10.1038/srep07292",

language = "English",

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T1 - Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2

AU - Yoshida, T.

AU - Ideta, S.

AU - Shimojima, T.

AU - Malaeb, W.

AU - Shinada, K.

AU - Suzuki, H.

AU - Nishi, I.

AU - Fujimori, A.

AU - Ishizaka, K.

AU - Shin, S.

AU - Nakashima, Y.

AU - Anzai, H.

AU - Arita, M.

AU - Ino, A.

AU - Namatame, H.

AU - Taniguchi, M.

AU - Kumigashira, H.

AU - Ono, K.

AU - Kasahara, S.

AU - Shibauchi, T.

AU - Terashima, T.

AU - Matsuda, Y.

AU - Nakajima, M.

AU - Uchida, S.

AU - Tomioka, Y.

AU - Ito, T.

AU - Kihou, K.

AU - Lee, C. H.

AU - Iyo, A.

AU - Eisaki, H.

AU - Ikeda, H.

AU - Arita, R.

AU - Saito, T.

AU - Onari, S.

AU - Kontani, H.

N1 - Funding Information: We are grateful to K. Kuroki and D.L. Feng for enlightening discussions. This work was supported by a Grant-in-Aid for Scientific Research on Innovative Area ‘‘Materials Design through Computics: Complex Correlation and Non-Equilibrium Dynamics’’ from MEXT, the Japan-China-Korea A3 Foresight Program and a Grant-in-Aid for Young Scientist (B) (22740221) from the Japan Society for the Promotion of Science. ARPES experiments were carried out at HiSOR (Proposal No. 10-B-27 and 11-B-1) and Photon Factory (Proposal No. 2009S2-005, No. 2012S2-001, and No. 2012G075).

PY - 2014/12/3

Y1 - 2014/12/3

N2 - We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As1-xPx)2 (x=0.30, Tc=30K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with modified s± gap with nodal loops. We have shown that the complicated gap modulation can be theoretically reproduced by considering both spin and orbital fluctuations.

AB - We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As1-xPx)2 (x=0.30, Tc=30K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with modified s± gap with nodal loops. We have shown that the complicated gap modulation can be theoretically reproduced by considering both spin and orbital fluctuations.

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U2 - 10.1038/srep07292

DO - 10.1038/srep07292

M3 - Article

AN - SCOPUS:84936801825

SN - 2045-2322

VL - 4

JO - Scientific Reports

JF - Scientific Reports

M1 - 7292

ER -

Anisotropy of the superconducting gap in the iron-based superconductor BaFe₂(As_1-xPx)₂

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