Study of the onset of superconductivity in underdoped La2−xSrxCuO4. Takami, T., Zhou, J. S., Cheng, J. G., Goodenough, J. B., Matsubayashi, K., & Uwatoko, Y. New Journal of Physics, 11(1):013057+, 2009.
Paper doi abstract bibtex The origin of the appearance of superconductivity in the high-transition-temperature (high- T c ) copper oxides has remained a subject of active inquiry. In order to address this issue, we chose La 2− x Sr x CuO 4 as a model system and succeeded in fine controlling the hole concentration around the composition where T c appears. T c did not emerge smoothly at a critical hole concentration, x c . T c and the absolute value of the Meissner signal below T c increased progressively with Sr content x \textgreater x c . Measurements of magnetization versus temperature under hydrostatic pressure ( P ) are also reported for La 2− x Sr x CuO 4 , which has no charge reservoir. A d T c /d P \textgreater 0 found in 0.05 \textless x \textless 0.22 peaks out at x 0.07. Comparison between these results and predictions from existing models for the high- T c superconductivity has been made.
@article{takami_study_2009,
title = {Study of the onset of superconductivity in underdoped {La}2−{xSrxCuO}4},
volume = {11},
issn = {1367-2630},
url = {http://dx.doi.org/10.1088/1367-2630/11/1/013057},
doi = {10.1088/1367-2630/11/1/013057},
abstract = {The origin of the appearance of superconductivity in the high-transition-temperature (high- T c ) copper oxides has remained a subject of active inquiry. In order to address this issue, we chose La 2− x Sr x CuO 4 as a model system and succeeded in fine controlling the hole concentration around the composition where T c appears. T c did not emerge smoothly at a critical hole concentration, x c . T c and the absolute value of the Meissner signal below T c increased progressively with Sr content x {\textgreater} x c . Measurements of magnetization versus temperature under hydrostatic pressure ( P ) are also reported for La 2− x Sr x CuO 4 , which has no charge reservoir. A d T c /d P {\textgreater} 0 found in 0.05 {\textless} x {\textless} 0.22 peaks out at x 0.07. Comparison between these results and predictions from existing models for the high- T c superconductivity has been made.},
number = {1},
journal = {New Journal of Physics},
author = {Takami, T. and Zhou, J. S. and Cheng, J. G. and Goodenough, J. B. and Matsubayashi, K. and Uwatoko, Y.},
year = {2009},
pages = {013057+}
}
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