NMR study of local structure in metallic La[sub 2]CuO[sub 4+[delta]]

Journal Article · Mon Jul 19 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.440· OSTI ID:7368918

Hammel, P C; Reyes, A P; Cheong, S; Fisk, Z ^[1]; Schirber, J E ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

We employ [sup 139]La NMR spectroscopy as a structural probe of metallic La[sub 2]CuO[sub 4+[delta]]. We find a distribution of lateral displacements of the oxygen atoms which form the apices of the oxygen octahedra. We directly observe a wide distribution of structures of the La-O layer; this distribution is strongly temperature dependent. We present copper NQR spectra which reveal a second, unexplained, copper site in the CuO[sub 2] planes. We show that these features are not manifestations of disturbances of the lattice by interstitial dopants, but are the intrinsic response of La[sub 2]CuO[sub 4+[delta]] to doped holes.

• OSTI ID: 7368918
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:3; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ATOMIC DISPLACEMENTS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL STRUCTURE
ELEMENTS
HIGH-TC SUPERCONDUCTORS
HOLES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM 139
LANTHANUM COMPOUNDS
LANTHANUM ISOTOPES
LANTHANUM OXIDES
MAGNETIC RESONANCE
METALS
NUCLEAR MAGNETIC RESONANCE
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RESONANCE
STABLE ISOTOPES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS