Angle-resolved photoemission spectroscopy study of the superconducting gap anisotropy in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital x}}
- Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Tata Institute of Fundamental Research, Bombay 400005 (India)
- Department of Physics, Tohoku University, 980 Sendai (Japan)
- National Research Institute for Metals, Sengen, Tsukuba, Ibaraki 305 (Japan)
We report measurements of the momentum dependence of the superconducting gap in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital x}} with angle-resolved photoemission spectroscopy using a dense sampling of the Brillouin zone in the vicinity of the Fermi surface. In the {ital Y} quadrant of the zone, where there are no complications from ghost bands caused by the superlattice, we find a gap function consistent within error bars to the form cos({ital k}{sub {ital x}}){minus}cos({ital k}{sub {ital y}}) expected for a {ital d}-wave order parameter. Similar results are found in the {ital X} quadrant with the photon polarization chosen to enhance main band emission over that due to ghost bands. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 385728
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 54, Issue 14; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
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