TY - JOUR
T1 - Angle-resolved photoemission observation of the superconducting-gap minimum and its relation to the nesting vector in the phonon-mediated superconductor YNi2 B2 C
AU - Baba, T.
AU - Yokoya, T.
AU - Tsuda, S.
AU - Watanabe, T.
AU - Nohara, M.
AU - Takagi, H.
AU - Oguchi, T.
AU - Shin, S.
PY - 2010/5/17
Y1 - 2010/5/17
N2 - We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy to directly study the large superconducting (SC) gap anisotropy of YNi2 B2 C. We succeed in measuring momentum (k) dependence of SC gap for individual Fermi surface (FS) sheets, which demonstrates complexity of SC gap in a phonon-mediated superconductor. Within measured k regions on FS sheets, we find a pointlike minimum of SC gap, whose k positions can be connected by the known nesting vector. This shows close correlation between the nesting vector and node formation.
AB - We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy to directly study the large superconducting (SC) gap anisotropy of YNi2 B2 C. We succeed in measuring momentum (k) dependence of SC gap for individual Fermi surface (FS) sheets, which demonstrates complexity of SC gap in a phonon-mediated superconductor. Within measured k regions on FS sheets, we find a pointlike minimum of SC gap, whose k positions can be connected by the known nesting vector. This shows close correlation between the nesting vector and node formation.
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U2 - 10.1103/PhysRevB.81.180509
DO - 10.1103/PhysRevB.81.180509
M3 - Article
AN - SCOPUS:77955447539
VL - 81
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 18
M1 - 180509
ER -