Fourfold symmetric anisotropy in the CuO_2 planes of 60-K-Yba_2Cu_3O_〈7-δ〉 ｓingle crystals

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概要

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• To study the anisotropy in the CuO_2 planes, the in-plane resistivity ρ has been measured on 60 K YBa_2Cu_3O_<7-δ> (YBCO) single crystal as a function of the angle θ between the directions of a magnetic field H and of the b axis under magnetic fields precisely parallel to the CuO_2 planes. Angular dependence of the resistivity ρ(θ) is mainly described by the fourfold symmetry, and a dip structure appears in ρ(θ) when the magnetic field is applied parallel to the a and b axes. The fourfold symmetry of the in-plane anisotropy of the resistivity is first observed in YBCO system. It is shown that the obtained results have a very close relation to the anisotropy which comes from the superconducting energy gap of the d-wave pairing with d_<x2-y2> symmetry and the effect of the directional vortex pinning.

• American Physical Societyの論文
• 2001-04-11

著者

• Shibata K

  Institute For Materials Research Tohoku University:institute Of Industrial Science University Of Tok

関連論文

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• Vortex slush regime in the Josephson vortex phase diagram of 60-K YBa_2Cu_3O_〈7-δ〉 single crystals
• Identification of Atomic Layers of YBa_2Cu_3O_ by Scanning Tunneling Microscopy and Spectroscopy
• Fourfold symmetric anisotropy in the CuO_2 planes of 60-K-Yba_2Cu_3O_〈7-δ〉 ｓingle crystals
• Oxygen-Sensitive Resistivity of La_2CuO_4 at High Temperatures

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