Pressure Dependence of TC of YCa0.2Ba1.8Cu4O8
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Resistive measurements in a cryogenic diamond anvil cell show that the critical temperature Tc of YCa0.2Ba1.8Cu4O8 can be increased from 90 K to 99 K by applying a pressure of 8.8 GPa. At higher pressures Tc decreases. An inverted parabola is well fitted through the data. This behavior can be explained by assuming that the number of holes in the CuO2-planes increases linearly upon applying pressure and that Tc as a function of the number of holes nh in the CuO2-planes follows the (parabolic-like) Tc(nh) phase diagram line.
KeywordsCritical Temperature Gold Wire Diamond Anvil Cell Solid State Inorg Inverted Parabola
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