Effects of Ce and F substitutions on the electronic structure of Nd sub 2 CuO sub 4 superconductors

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.1166· OSTI ID:6258885

Agrawal, B K; Agrawal, S; Yadav, P S; Kumar, S ^[1]

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1. Department of Physics, University of Allahabad, Allahabad 211 002, India (IN)

The changes incurred by the replacement of Nd (or O) by Ce (or F) atoms on the electronic energy states of the superconducting Nd{sub 2}CuO{sub 4} compounds have been investigated in a tight-binding approximation. A minimum number of parameters have been employed in the calculation. The various peaks observed in the direct and inverse photoemission data of Reihl {ital et} {ital al}. are well explained. The calculated shift in Fermi level with {ital x} (or {ital y}) in Nd{sub 2{minus}{ital x}}Ce{sub {ital x}}CuO{sub 4} (or Nd{sub 2}CuO{sub 4{minus}{ital y}}F{sub {ital y}}) is seen to be in agreement with the experiment. Further, our model detects an unoccupied Cu 4{ital s} band just at the conduction-band edge, as has been detected in electron-spin-resonance experiments.

• OSTI ID: 6258885
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:1; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CERIUM
COPPER COMPOUNDS
CUPRATES
DOPED MATERIALS
ELECTRON SPIN RESONANCE
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY LEVELS
FERMI LEVEL
FLUORINE
HALOGENS
HIGH-TC SUPERCONDUCTORS
MAGNETIC RESONANCE
MATERIALS
METALS
NEODYMIUM COMPOUNDS
NONMETALS
OXYGEN COMPOUNDS
PHOTOEMISSION
RARE EARTH COMPOUNDS
RARE EARTHS
RESONANCE
SECONDARY EMISSION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS