NMR study on the local structure in La-based high-Tc cuprates

Details NMR study on the local structure in La-based high-Tc cuprates NMR study on the local structure in La-based high-Tc cuprates

2008-02-22

arxiv.org/abs/0802.3240v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures, proceeding of LEHTSC2007, to appear in J. Phys.: Conf. Series

Scientific paper

To date, there has been no evidence for the macroscopic structural phase transition to the low temperature tetragonal structure (LTT) with a space group P42/ncm in high-TC cuprate of rare earth-free La2-xSrxCuO4 (LSCO). By investigating Cu-NMR on single crystals, we have found that spatially incoherent LTT structure emerges below 50 K in the sample with x=0.12. This incoherent structure is considered to play a key role for the slight depression of the superconductivity around x=1/8.

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