0 Introduction In recent years, the study of Y-Ba-Cu-O superconductor have made much progress. The superconducting applications are showing bright future. Generally, critical current is very lower (especially bulk sam...0 Introduction In recent years, the study of Y-Ba-Cu-O superconductor have made much progress. The superconducting applications are showing bright future. Generally, critical current is very lower (especially bulk sample ). The Largest J_c is only 10~3 A/cm^2. Ordinarilly, the typical critical current of Nb-Ti alloy is 10~6 A/cm^2 about 4.2 K. Hence, the level of current density have become a problem interested in by scientists. In this paper, microstrueture of Y_1 Ba_2 Cu_2 O_(7-8) superconductor is examined. The grade intersection-tunnel modal is put forward here. Some mecha-展开更多
考虑到d 波超导表面时间反演对称态的破缺与粗糙散射效应,在Blonder- Tinkham -Klapw ijk(BTK)理论框架下,通过求解Bogoliubov- de Gennes(BdG)方程,计算正常金属- d 波超导隧道结中的准粒子输运系数、隧道谱和束缚态密度。研究表明:(1...考虑到d 波超导表面时间反演对称态的破缺与粗糙散射效应,在Blonder- Tinkham -Klapw ijk(BTK)理论框架下,通过求解Bogoliubov- de Gennes(BdG)方程,计算正常金属- d 波超导隧道结中的准粒子输运系数、隧道谱和束缚态密度。研究表明:(1)d 波超导表面时间反演对称态的破缺会导致零偏压电导峰位移,位移的程度取决于分解d 波超导表面时间反演对称态中S波分量的强度;(2)粗糙界面散射不仅可压低零偏压电导峰,还会阻碍零偏压电导峰的位移。所得的这些结果能很好地解释目前有关高TC展开更多
文摘0 Introduction In recent years, the study of Y-Ba-Cu-O superconductor have made much progress. The superconducting applications are showing bright future. Generally, critical current is very lower (especially bulk sample ). The Largest J_c is only 10~3 A/cm^2. Ordinarilly, the typical critical current of Nb-Ti alloy is 10~6 A/cm^2 about 4.2 K. Hence, the level of current density have become a problem interested in by scientists. In this paper, microstrueture of Y_1 Ba_2 Cu_2 O_(7-8) superconductor is examined. The grade intersection-tunnel modal is put forward here. Some mecha-
