Theoretical Study on the Pressure Induced Tc Change in YBa2Cu3Ox |
M.M. Milić
Laboratory of Theoretical and Condensed Matter Physics, Institute of Nuclear Sciences "Vinča", University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia |
Received: April 24, 2013 |
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Pressure effect on the critical temperature, Tc, of the YBa2Cu3Ox superconductor was considered in the frame of a simple theoretical model which as a starting point assumes that Tc vs. pressure, P, dependence can be described by an inverted parabola. Available experimental results on Tc behavior under pressure were analyzed as a function of the zero pressure hole concentration in the superconducting CuO2 planes, nh (P = 0 GPa)= nh0, for different constant values of P. Maximum Tc that can be achieved under pressure was estimated and discussed in relation to the nh0 = 1/8 doping and establishment of charge and spin order. The results obtained here were used to estimate increase of the hole concentration in the CuO2 planes which occurs as a result of pressure induced oxygen reordering. |
DOI: 10.12693/APhysPolA.124.745 PACS numbers: 74.62.Fj, 74.72.-h |