High-pressure study of the anomalous isotope effect in La2-xAxCuO4 with A=Sr or Ba

Q. Xiong, J. W. Chu, Y. Y. Sun, H. H. Feng, S. Budko, P. H. Hor, C. W. Chu

研究成果: Article同行評審

20 引文 斯高帕斯(Scopus)

摘要

The superconducting transition temperature (Tc) of well-characterized samples of La2-xAxCuO4 (LSCO or LBCO) with A=Sr or Ba at and close to x=0.12, where the oxygen isotrope effect displays a maximum, has been determined under hydrostatic pressures up to 16 kbar. In spite of the chemical similarity between the two compound systems, dTc/dP at x0.12 exhibits a minimum in LSCO in contrast to an expected maximum similar to that in LBCO, which undergoes a low-temperature structural transformation at this x. The results suggest that the anomalous isotope effect previously reported in LSCO and LBCO cannot be simply attributed to structural instabilities associated with the compound systems, but is consistent with an electronic transition of the Lifshitz type in these compounds.

原文English
頁(從 - 到)581-584
頁數4
期刊Physical Review B
46
發行號1
DOIs
出版狀態Published - 1992

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

指紋

深入研究「High-pressure study of the anomalous isotope effect in La2-xAxCuO4 with A=Sr or Ba」主題。共同形成了獨特的指紋。

引用此