Y_(1-x)Ca_xBa_2Cu_3O_6系统中空穴掺杂诱导的绝缘体-金属转变和超导电性  

INSULATOR-METAL TRANSITION AND SUPERCONDUCTI- VITY INDUCED BY HOLE DOPING IN Y_(1-X)Ca_xBa_2Cu_3O_6 SYSTEM

作　　者：赵勇[1] 诸葛向彬[1] 何业冶[2] 

机构地区：[1]浙江大学物理系,杭州310027 [2]中国科学院低温技术实验中心,北京100080

出　　处：《物理学报》1992年第7期1151-1156,共6页Acta Physica Sinica

基　　金：霍英东青年教师基金

摘　　要：本文报道利用Ca部分取代Y的方法,将空穴引入绝缘的YBa_2Cu_3O_6系统中,使其发生由绝缘体到超导体的转变,并通过研究其电子输运性质、磁性质,以及晶体结构的变化,揭示了具有适当载流子浓度的CuO面是维持高Tc超导电性的重要条件。By the substitution of Ca for Y, the holes are introduced into the insulating host material YBa2Cu3O6, and an insulator-to-metal transition, as well as superconductivity at 60K, is observed. The measurements of crystal structure, resistivity and ac susceptibility are performed, and the results indicate that the CuO planes with sufficient carrier concentration is the important condition for sustaining the high-Tc superconductivity.

关 键 词：YCaBaCuO 空穴 掺杂 超导电性 

分 类 号：O511.2[理学—低温物理]