@article{a312ef2932be4d10b63ee578133cc116,
title = "Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(F e0.65 R u0.35)2 A s2: Effects of spin-orbit coupling",
abstract = "We have investigated the superconducting (SC) gap on hole Fermi surfaces (FSs) of optimally substituted Ba(Fe0.65Ru0.35)2As2 by angle-resolved photoemission spectroscopy (APRES) using bulk-sensitive 7 eV laser and synchrotron radiation. It was found that, whereas the gap is isotropic in the kx-ky plane, the gap magnitudes of two resolved hole FSs show similar kz dependences and decrease as kz approaches ∼2π/c (i.e., around the Z point), unlike the other Fe-based superconductors reported so far, where the SC gap of only one hole FS shows a strong kz dependence. This unique gap structure can be understood in the scenario that the dz2 orbital character is mixed into both hole FSs due to finite spin-orbit coupling (SOC) and is reproduced by calculation within the random phase approximation including the SOC.",
author = "L. Liu and K. Okazaki and T. Yoshida and H. Suzuki and M. Horio and Ambolode, {L. C.C.} and J. Xu and S. Ideta and M. Hashimoto and Lu, {D. H.} and Shen, {Z. X.} and Y. Ota and S. Shin and M. Nakajima and S. Ishida and K. Kihou and Lee, {C. H.} and A. Iyo and H. Eisaki and T. Mikami and T. Kakeshita and Y. Yamakawa and H. Kontani and S. Uchida and A. Fujimori",
note = "Funding Information: This paper was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) KAKENHI Grants No. JP15H02109, No. JP25220707, and No. JP26610095 and the Photon and Quantum Basic Research Coordinated Development Program of MEXT. The Stanford Synchrotron Radiation Lightsource is operated by the Office of Basic Energy Science, US Department of Energy. Part of this paper was conducted in Research Hub for Advanced Nano Characterization, University of Tokyo, supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. L.L. thanks the MEXT Scholarship Program of Japan and the China Scholarship Council (CSC) for financial support. H.S. and M.H. acknowledge financial support from the Advanced Leading Graduate Course for Photon Science (ALPS) and the JSPS Research Fellowship for Young Scientists. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = mar,
day = "6",
doi = "10.1103/PhysRevB.95.104504",
language = "English",
volume = "95",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "10",
}