Evidence for superconductivity in La 2 CuO 4
作者： P. M. Grant , S. S. P. Parkin , V. Y. Lee , E. M. Engler , M. L. Ramirez
DOI: 10.1103/PHYSREVLETT.58.2482
关键词:
摘要: We report evidence for superconductivity in undoped ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$ obtained from resistivity, thermoelectric power, and susceptibility measurements. The onset temperature is near 40 K we have determined its pressure field dependence resistivity. superconducting behavior of a trace filamentary nature quite sensitive to stoichiometry. Its occurrence extremely process dependent an be controlled by oxygen pressure. discuss several likely sources the activity.
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