Softening of Cu-O vibrational modes as a precursor to onset of superconductivity in EuBa2Cu3O7-

P. Boolchand, R. N. Enzweiler, Ivan Zitkovsky, Jack Wells, Wayne Bresser, Darl McDaniel, R. L. Meng, P. H. Hor, C. W. Chu, C. Y. Huang

研究成果: Article同行評審

54 引文 斯高帕斯(Scopus)

摘要

T-dependent Sn119 Mossbauer Debye-Waller factor f(T) in EuBa2Cu2.98Sn0.02O7- displays evidence of a substantial softening in lattice vibrations at T110 K. In a previous Eu151 study, no detectable softening in f(T) was found at the rare-earth site. These results taken together show that Sn atoms as a dilute impurity replace predominantly Cu(1) sites in the Cu-O chains of the orthorhombic structure. It appears that a softening in vibrational modes localized onto the Cu-O linear chains occurs as a precursor to the onset of superconductivity. These results show that phonons do appear to play an important role in electron pairing in these high-Tc oxide superconductors.

原文English
頁(從 - 到)3766-3769
頁數4
期刊Physical Review B
37
發行號7
DOIs
出版狀態Published - 1988

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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