NMR study of local structure in metallic La2CuO4+δ

P. C. Hammel, A. P. Reyes, S. W. Cheong, Z. Fisk, J. E. Schirber

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Abstract

We employ La139 NMR spectroscopy as a structural probe of metallic La2CuO4+δ. 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 CuO2 planes. We show that these features are not manifestations of disturbances of the lattice by interstitial dopants, but are the intrinsic response of La2CuO4+δ to doped holes.

Original languageEnglish (US)
Pages (from-to)440-443
Number of pages4
JournalPhysical review letters
Volume71
Issue number3
DOIs
StatePublished - 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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