Abrupt change in the energy gap of superconducting Ba 1-xK xFe 2As 2 single crystals with hole doping

W. Malaeb; T. Shimojima; Y. Ishida; K. Okazaki; Y. Ota; K. Ohgushi; K. Kihou; T. Saito; C. H. Lee; S. Ishida; M. Nakajima; S. Uchida; H. Fukazawa; Y. Kohori; A. Iyo; H. Eisaki; C. T. Chen; S. Watanabe; H. Ikeda; S. Shin

doi:10.1103/PhysRevB.86.165117

Abrupt change in the energy gap of superconducting Ba _1-xK _xFe ₂As ₂ single crystals with hole doping

W. Malaeb, T. Shimojima, Y. Ishida, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, T. Saito, C. H. Lee, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, Y. Kohori, A. Iyo, H. Eisaki, C. T. Chen, S. Watanabe, H. Ikeda, S. Shin

研究成果: Article › 査読

55 被引用数 (Scopus)

抄録

We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba _1-xK _xFe ₂As ₂ (BaK) and precisely determined the doping evolution of the superconducting gaps in this compound. The gap size of the outer hole Fermi-surface (FS) sheet around the Brillouin zone (BZ) center shows an abrupt drop with overdoping (for x 0.6) while the inner and middle FS gaps roughly scale with T _c. This is accompanied by the simultaneous disappearance of the electron FS sheet with similar orbital character at the BZ corner. These results indicate the different contributions of X2-Y2 and XZ/YZ orbitals to superconductivity in BaK and can hardly be completely reproduced by the available theories on iron-based superconductors.

本文言語	English
論文番号	165117
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	86
号	16
DOI	https://doi.org/10.1103/PhysRevB.86.165117
出版ステータス	Published - 2012 10月 10
外部発表	はい

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1103/PhysRevB.86.165117

他のファイルとリンク

引用スタイル

Malaeb, W., Shimojima, T., Ishida, Y., Okazaki, K., Ota, Y., Ohgushi, K., Kihou, K., Saito, T., Lee, C. H., Ishida, S., Nakajima, M., Uchida, S., Fukazawa, H., Kohori, Y., Iyo, A., Eisaki, H., Chen, C. T., Watanabe, S., Ikeda, H., & Shin, S. (2012). Abrupt change in the energy gap of superconducting Ba _1-xK _xFe ₂As ₂ single crystals with hole doping. Physical Review B - Condensed Matter and Materials Physics, 86(16), [165117]. https://doi.org/10.1103/PhysRevB.86.165117

Malaeb, W, Shimojima, T, Ishida, Y, Okazaki, K, Ota, Y, Ohgushi, K, Kihou, K, Saito, T, Lee, CH, Ishida, S, Nakajima, M, Uchida, S, Fukazawa, H, Kohori, Y, Iyo, A, Eisaki, H, Chen, CT, Watanabe, S, Ikeda, H & Shin, S 2012, 'Abrupt change in the energy gap of superconducting Ba _1-xK _xFe ₂As ₂ single crystals with hole doping', Physical Review B - Condensed Matter and Materials Physics, vol. 86, no. 16, 165117. https://doi.org/10.1103/PhysRevB.86.165117

@article{8a104517d31842bdbcbc993339903a20,

title = "Abrupt change in the energy gap of superconducting Ba 1-xK xFe 2As 2 single crystals with hole doping",

abstract = "We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba 1-xK xFe 2As 2 (BaK) and precisely determined the doping evolution of the superconducting gaps in this compound. The gap size of the outer hole Fermi-surface (FS) sheet around the Brillouin zone (BZ) center shows an abrupt drop with overdoping (for x 0.6) while the inner and middle FS gaps roughly scale with T c. This is accompanied by the simultaneous disappearance of the electron FS sheet with similar orbital character at the BZ corner. These results indicate the different contributions of X2-Y2 and XZ/YZ orbitals to superconductivity in BaK and can hardly be completely reproduced by the available theories on iron-based superconductors.",

author = "W. Malaeb and T. Shimojima and Y. Ishida and K. Okazaki and Y. Ota and K. Ohgushi and K. Kihou and T. Saito and Lee, {C. H.} and S. Ishida and M. Nakajima and S. Uchida and H. Fukazawa and Y. Kohori and A. Iyo and H. Eisaki and Chen, {C. T.} and S. Watanabe and H. Ikeda and S. Shin",

year = "2012",

month = oct,

day = "10",

doi = "10.1103/PhysRevB.86.165117",

language = "English",

volume = "86",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "0163-1829",

publisher = "American Institute of Physics Publising LLC",

number = "16",

}

TY - JOUR

T1 - Abrupt change in the energy gap of superconducting Ba 1-xK xFe 2As 2 single crystals with hole doping

AU - Malaeb, W.

AU - Shimojima, T.

AU - Ishida, Y.

AU - Okazaki, K.

AU - Ota, Y.

AU - Ohgushi, K.

AU - Kihou, K.

AU - Saito, T.

AU - Lee, C. H.

AU - Ishida, S.

AU - Nakajima, M.

AU - Uchida, S.

AU - Fukazawa, H.

AU - Kohori, Y.

AU - Iyo, A.

AU - Eisaki, H.

AU - Chen, C. T.

AU - Watanabe, S.

AU - Ikeda, H.

AU - Shin, S.

PY - 2012/10/10

Y1 - 2012/10/10

N2 - We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba 1-xK xFe 2As 2 (BaK) and precisely determined the doping evolution of the superconducting gaps in this compound. The gap size of the outer hole Fermi-surface (FS) sheet around the Brillouin zone (BZ) center shows an abrupt drop with overdoping (for x 0.6) while the inner and middle FS gaps roughly scale with T c. This is accompanied by the simultaneous disappearance of the electron FS sheet with similar orbital character at the BZ corner. These results indicate the different contributions of X2-Y2 and XZ/YZ orbitals to superconductivity in BaK and can hardly be completely reproduced by the available theories on iron-based superconductors.

AB - We performed a laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba 1-xK xFe 2As 2 (BaK) and precisely determined the doping evolution of the superconducting gaps in this compound. The gap size of the outer hole Fermi-surface (FS) sheet around the Brillouin zone (BZ) center shows an abrupt drop with overdoping (for x 0.6) while the inner and middle FS gaps roughly scale with T c. This is accompanied by the simultaneous disappearance of the electron FS sheet with similar orbital character at the BZ corner. These results indicate the different contributions of X2-Y2 and XZ/YZ orbitals to superconductivity in BaK and can hardly be completely reproduced by the available theories on iron-based superconductors.

UR - http://www.scopus.com/inward/record.url?scp=84867460553&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867460553&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.86.165117

DO - 10.1103/PhysRevB.86.165117

M3 - Article

AN - SCOPUS:84867460553

VL - 86

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 0163-1829

IS - 16

M1 - 165117

ER -