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Photoemission study of absorption mechanisms in Bi sub 2. 0 Sr sub 1. 8 Ca sub 0. 8 La sub 0. 3 Cu sub 2. 1 O sub 8+. delta. , BaBiO sub 3 , and Nd sub 1. 85 Ce sub 0. 15 CuO sub 4

Journal Article · · Physical Review (Section) B: Condensed Matter; (USA)
; ; ;  [1];  [2];  [3];  [4];  [5];
  1. Stanford Electronics Laboratories, Stanford University, Stanford, California 94305 (US)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  3. Stanford Electronics Laboratories, Stanford University, Stanford, California 94305
  4. Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120
  5. Department of Applied Physics, Stanford University, Stanford, California 94305
+ Show Author Affiliations

Photoemission measurements in the constant-final-state (absorption) mode were performed on three different classes of high-temperature superconductors Bi{sub 2.0}Sr{sub 1.8}Ca{sub 0.8}La{sub 0.3}Cu{sub 2.1}O{sub 8+{delta}}, BaBiO{sub 3}, and Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4} using synchrotron radiation from 20 to 200 eV. Absorption signals from all elements but Ce are identified. The results firmly show that the Bi 6{ital s} electrons are more delocalized in BaBiO{sub 3} than in Bi{sub 2.0}Sr{sub 1.8}Ca{sub 0.8}La{sub 0.3}Cu{sub 2.1}O{sub 8+{delta}}, in agreement with the results of band-structure calculations. Differences in the absorption signals due to O and Bi excitations between BaBiO{sub 3} and Bi{sub 2.0}Sr{sub 1.8}Ca{sub 0.8}La{sub 0.3}Cu{sub 2.1}O{sub 8+{delta}} are discussed. Delayed absorption onsets attributed to giant resonances (Ba 4{ital d}{r arrow}4{ital f}, La 4{ital d}{r arrow}4{ital f}, and Nd 4{ital d}{r arrow}4{ital f} transitions) are also reported.

DOE Contract Number:
AC03-82ER13000
OSTI ID:
5300798
Journal Information:
Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:13; ISSN PRBMD; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
BREMSSTRAHLUNG
CALCIUM COMPOUNDS
CALCIUM OXIDES
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MONOCRYSTALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
RARE EARTH COMPOUNDS
RESONANCE
SPECTRA
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS