作 者：
;
;
机构地区：
北京科技大学材料科学与工程学院材料物理与化学系
出 处：
《Chinese Journal of Chemical Physics》
1994年第3期263-269,共7页
摘 要：
本文提出了平均电离势的概念,并对氧化物超导体的平均电离势进行了研究.结果表明,具有超导电性的氧化物其值比较集中,在10.20～10.50eV的范围内,而非超导氧化物的值比较分散.这可做为氧化物超导电性的一个标志或判据.在Y(123)中,氧含量的变化导致T_c随的增加而增加,但阳离子的变化则导致T_c随的增加而减小.不过两者都是通过改变体系值而引起T_c变化的.与超导电性存在着密切的联系.
The concept of mean ionization potential of crystal is proposed, and the of Oxide Superconduetors is investigated in this paper. The result shows, that the values of almost all supercondueting oxides cencentrate in a narrow rarge from 10.20 to 10.50eV, while that of non-superconducting oxides scatter outside this region. This characteristics may be then as a new mark or criterion for oxide superconductivity. In Y(123), the variation of oxygen content results in the increase of Tc upon increase of < U0>, while the substitution of Ba2+ by Sr2+ results in the increase of Tc upon increase of < U0>. However in both cases, the variation of Tc is caused by the change of < U0 >. So the mean ionization potential < U0 > is closely correlated with the superconductivity of oxides.
关 键 词：
氧化物
超导体
电离势
领 域：
[理学]
[理学]
