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}}

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.R9678· OSTI ID:385728

Ding, H ^[1]; Norman, M R ^[1]; Campuzano, J C ^[2]; Randeria, M ^[3]; Bellman, A F ^[1]; Yokoya, T; Takahashi, T ^[4]; Mochiku, T; Kadowaki, K ^[5]

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1. Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Tata Institute of Fundamental Research, Bombay 400005 (India)
4. Department of Physics, Tohoku University, 980 Sendai (Japan)
5. 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 Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 385728
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR RESOLUTION
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
ENERGY GAP
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
MULTI-ELEMENT COMPOUNDS
PHOTOEMISSION
STRONTIUM OXIDES