TY - JOUR
T1 - Fourfold symmetry in the plane of the upper critical field for single-cr
T2 - Evidence for pairing in a high superconductor
AU - Koike, Yoji
AU - Takabayashi, Tsutomu
AU - Noji, Takashi
AU - Nishizaki, Terukazu
AU - Kobayashi, Norio
PY - 1996/1/1
Y1 - 1996/1/1
N2 - We have found clear anisotropy in the (Formula presented) plane with fourfold symmetry of the upper critical field for single-crystal (Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented), which is very similar to that formerly observed in (Formula presented)(Formula presented)Cu(Formula presented) . This is neither attributed to the twin structure in the orthorhombic phase nor to the anisotropy of the Fermi surface but is explained as being mainly due to the anisotropy of the superconducting energy gap owing to (Formula presented) pairing, which supports (Formula presented) pairing in a high-(Formula presented) superconductor.
AB - We have found clear anisotropy in the (Formula presented) plane with fourfold symmetry of the upper critical field for single-crystal (Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented), which is very similar to that formerly observed in (Formula presented)(Formula presented)Cu(Formula presented) . This is neither attributed to the twin structure in the orthorhombic phase nor to the anisotropy of the Fermi surface but is explained as being mainly due to the anisotropy of the superconducting energy gap owing to (Formula presented) pairing, which supports (Formula presented) pairing in a high-(Formula presented) superconductor.
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U2 - 10.1103/PhysRevB.54.R776
DO - 10.1103/PhysRevB.54.R776
M3 - Article
AN - SCOPUS:0000770672
VL - 54
SP - R776-R779
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 2
ER -