Effects of Th doping on structural and superconductive properties of La2-xBaxCuO4

Y. Maeno, N. Kakehi, M. Kato, T. Fujita

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


The striking suppression of superconductivity of La2-xBaxCuO4 in a narrow range of x around 0.125 is known to be a consequence of a structural transition to a low-temperature tetragonal phase below about 60 K. Study of low-temperature lattice instabilities by x-ray diffraction revealed that in La2-y-xThyBaxCuO4 the development of the low-temperature tetragonal phase, as well as the sharp suppression of superconductivity, is centered at x-y0.125, instead of x0.125. Therefore, the anomalous low-temperature behavior is essentially characterized by the density of carriers rather than local ionic forces, which couples with the lattice instabilities.

Original languageEnglish
Pages (from-to)7753-7756
Number of pages4
JournalPhysical Review B
Issue number14
Publication statusPublished - 1991


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