Evidence for a fermi surface in Bi2Sr2CaCu2O8+δ measured by positron 2D-ACAR


Conference Paper

We report positron 2D-ACAR measurements of superconducting single crystal Bi2Sr2CaCu2O8+δ (unannealed, Te ≈ 90K). The observed anisotropy exhibits a two-fold (rather than four-fold) symmetry, which is attributed to the superlattice modulation along the b-axis of the B2O2 layers. Temperature dependent fine structures in the anisotropies are also noted. Subtraction of the superlattice contribution reveals a pair momentum distribution consistent with both the CuO2 and BiO2 Fermi surfaces and in reasonable agreement with the theoretical pair momentum density derived from band theory. © 1991.

Full Text

Duke Authors

Cited Authors

  • Chan, LP; Harshman, DR; Lynn, KG; Massidda, S; Mitzi, DB

Published Date

  • January 1, 1991

Published In

Volume / Issue

  • 52 / 11-12

Start / End Page

  • 1557 - 1567

International Standard Serial Number (ISSN)

  • 0022-3697

Digital Object Identifier (DOI)

  • 10.1016/0022-3697(91)90140-U

Citation Source

  • Scopus