The Disorder Effect And Pressure Effect Of Superconductivity

This thesis deals with both disorder effect and, 'pressure effect on the Supercond— ucting transition temperature. It Consists of two nearly independent works whieh are presented in Chapter II and Chapter III respectively .In Chapter I we Summarize the research Work of this field and give some general Comments on the effects of disorder , press— ure , and Structural phase transition on Superconducting properties .In Chapter II we study the high to Superconductor BPB ( i. e B_oP_b1x Bi_x O₃ ) whichincludes no transition elements . For the first time we have given it's Tc—x relati-on theoretically by CPA method for the...