Theoretical study of the structural dependence of nuclear quadrupole frequencies in high- T sub c superconductors

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.8809· OSTI ID:5371884

Garcia, M E; Bennemann, K H ^[1]

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1. Institute for Theoretical Physics, Freie Universitaet Berlin, Arnimallee 14, D-1000 Berlin 33, Federal Republic of Germany (DE)

The remarkable difference between the nuclear quadrupole frequencies {nu}{sub {ital Q}} of Cu(1) and Cu(2) in YBa{sub 2}Cu{sub 3}O{sub 6} and YBa{sub 2}Cu{sub 3}O{sub 7} is analyzed. We calculate the ionic contribution to the electric field gradients and estimate, by using experimental results for Cu{sub 2}O and La{sub 2}CuO{sub 4}, the contribution of the {ital d} valence electrons. Thus, we determine {nu}{sub {ital Q}1}, {nu}{sub {ital Q}2}, and the asymmetry parameter {eta} for YBa{sub 2}Cu{sub 3}O{sub 6} and YBa{sub 2}Cu{sub 3}O{sub 7}. The number of holes in the Cu-O planes and chains is found to be important for the different behavior of {nu}{sub {ital Q}1} and {nu}{sub {ital Q}2}.

• OSTI ID: 5371884
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:13; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
NUCLEAR QUADRUPOLE RESONANCE
OXIDES
OXYGEN COMPOUNDS
RESONANCE
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES