| http://www.w3.org/ns/prov#value | - These ideas have mainly been invoked in view of the facts that (i) at optimum doping, that is, at the maximum value of the superconducting transition temperature , the isotope effect on is negligibly small [4]; (ii) the superconducting transition temperatures above liquid nitrogen are beyond the BCS scheme; (iii) the antiferromagnetic (AFM) properties of
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