Angle-resolved photoemission on untwinned YBa{sub 2}Cu{sub 3}O{sub 6.95}. II. Determination of Fermi surfaces
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Applied Physics, Stanford University, Stanford, California 94305 (United States)
- Department of Applied Physics, Department of Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305 (United States)
- Department of Applied Physics and Department of Physics, Stanford University, Stanford, California 94305 (United States)
- Department of Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305 (United States)
- Department of Physics and Astronomy, University of Bristish Columbia, Vancouver, British Columbia, V6T 1Z1 (CANADA)
We present complete Fermi-surface mappings of an untwinned single crystal of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} in two distinct photon polarization geometries. Various methods for Fermi-surface determination with angle-resolved photoelectron spectroscopy are discussed and a technique based on the momentum space density of states is developed and applied. The data reveal the presence of two CuO{sub 2} plane-derived Fermi-surface pockets, along with weak evidence for a single chain sheet, in agreement with earlier work on twinned crystals and {ital ab initio} predictions, but show no sign of the expected {open_quotes}stick{close_quotes} pocket centered at ({pi},{pi}). In contrast with earlier work on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}, we see no evidence for {open_quotes}shadow bands{close_quotes} in optimally doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, supporting the contention that these features arise from structural rather than magnetic correlations. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 570294
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 57; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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