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