【摘要】 本文讨论了热处理过程对浇铸退火方法制备的 Bi-Pb-Sr-Ca-Cu-O 样品的电子输运性质和超导电性的影响.分析了发生非金属-金属(超导)转变的物理过程.指出无论是原子的无序分布,还是氧空位所引起的无规势场增强,都会导致电子局域化增强,使得样品金属性减弱和超导转变温度降低.更多还原

【Abstract】 The effect of heat treatment process on the electron transport property and superconductivity of the Bi-Pb-Sr-Ca-Cu-O samples made by cast-annealing method is discussed.The nonme-tal-metal (superconductor) transition is also analysed.It is suggested that the increase of the random potential caused by either the disorder distribution of atoms or the oxygen vacancies in the lattices can enhance the electron localization,weaken the metalic property and lower the superconducting transition temperature of the sample.更多还原