Fourfold symmetry in the ab-plane of the upper critical field for the high-Tc cuprates

T. Noji, T. Takabayashi, T. Nishizaki, N. Kobayashi, Y. Koike

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1 Citation (Scopus)

Abstract

We have found clear anisotropy in the ab plane with fourfold symmetry of the resistive superconducting transition under magnetic fields for single-crystal Pb2Sr2Y0.62Ca0.38Cu 3O8 , which is regarded as anisotropy of the upper critical field Hc2. This is not only qualitatively but also quantitatively similar to that formerly observed in La1.86Sr0.14CuO4 . The observed fourfold symmetry is explained as being mainly due to the anisotropy of the superconducting energy gap owing to dx2-y2 pairing. Hc2 , one of the bulk properties, supports dx2-y2 pairing in the high-Tc superconductivity.

Original languageEnglish
Pages (from-to)533-538
Number of pages6
JournalJournal of Low Temperature Physics
Volume105
Issue number3-4
DOIs
Publication statusPublished - 1996 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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