Ontology type: schema:ScholarlyArticle
2013-11-10
AUTHORSA. P. Menushenkov, A. V. Kuznetsov, R. V. Chernikov, A. A. Ivanov, V. V. Sidorov, K. V. Klementiev
ABSTRACTTemperature-dependent X-ray absorption spectra of the hole-doped La2−xSrxCuO4 and electron-doped Nd2−xCexCuO4−δ high-temperature superconductors were investigated above the Cu K absorption edge. We observed strong anharmonicity in the superconductive CuO2 plane. For x=0.15 it was shown that part of oxygen ions oscillate in a double-well potential and their vibrations are correlated with the local electron (hole) pair transfer. We suppose that at a low temperature the phase coherence of the local pair movement is determined by the peculiarities of the perovskite-like structure which includes the stiff CuOn (n=4,6) complexes combined by collective rotational and breathing modes. More... »
PAGES925-928
http://scigraph.springernature.com/pub.10.1007/s10948-013-2411-1
DOIhttp://dx.doi.org/10.1007/s10948-013-2411-1
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