Doping dependence of the gap anisotropy of the high-temperature YBa2 Cu3 O7-δ superconductor

K. Nakayama, T. Sato, Kensei Terashima, T. Arakane, T. Takahashi, M. Kubota, K. Ono, T. Nishizaki, Y. Takahashi, N. Kobayashi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of YBa2 Cu3 O7-δ with various hole concentrations from under-to-optimal doping. We have determined the momentum dependence of bulk superconducting gap as a function of hole concentration and found the enhancement of antinodal gap, the deviation from simple d x2 - y2 wave, and the reduction of superconducting coherence weight in the underdoped region. We also found the universality of the doping dependence of the SC-gap size and symmetry in bilayered cuprates. These results suggest the importance of the long-range pairing interactions in the underdoped region.

Original languageEnglish
Article number140503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number14
DOIs
Publication statusPublished - Apr 1 2009
Externally publishedYes

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Hole concentration
Superconducting materials
Anisotropy
Doping (additives)
anisotropy
Photoelectron spectroscopy
Momentum
Temperature
cuprates
photoelectric emission
deviation
momentum
augmentation
high resolution
symmetry
spectroscopy
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Doping dependence of the gap anisotropy of the high-temperature YBa2 Cu3 O7-δ superconductor. / Nakayama, K.; Sato, T.; Terashima, Kensei; Arakane, T.; Takahashi, T.; Kubota, M.; Ono, K.; Nishizaki, T.; Takahashi, Y.; Kobayashi, N.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 79, No. 14, 140503, 01.04.2009.

Research output: Contribution to journalArticle

Nakayama, K, Sato, T, Terashima, K, Arakane, T, Takahashi, T, Kubota, M, Ono, K, Nishizaki, T, Takahashi, Y & Kobayashi, N 2009, 'Doping dependence of the gap anisotropy of the high-temperature YBa2 Cu3 O7-δ superconductor', Physical Review B - Condensed Matter and Materials Physics, vol. 79, no. 14, 140503. https://doi.org/10.1103/PhysRevB.79.140503
Nakayama, K. ; Sato, T. ; Terashima, Kensei ; Arakane, T. ; Takahashi, T. ; Kubota, M. ; Ono, K. ; Nishizaki, T. ; Takahashi, Y. ; Kobayashi, N. / Doping dependence of the gap anisotropy of the high-temperature YBa2 Cu3 O7-δ superconductor. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 79, No. 14.
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