Anisotropic gap above Tc in underdoped BSCCO
Abstract
We report ARPES spectra both above and below Tc in underdoped superconducting thin films of Bi 2212 grown by molecular beam epitaxy. Underdoping (as controlled by oxygen content and/or Dy doping) is found to introduce a new feature in the electronic structure, an anisotropic gap which persists well above T_c. As in the superconducting state, the gap is measurable near (π,0) and is zero within experimental resolution at 0.4(π,π).
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1996
- Bibcode:
- 1996APS..MAR.R3704H