Ca^(2+)和Mn^(4+)掺杂对烧绿石铱化物Bi_2Ir_2O_7电输运性质的影响（英文）  

The electrical transport properties and of pyrochlore oxide Bi_2Ir_2O_7 by Ca^(2+) and Mn^(4+) doping

作　　者：梁丹丹[1,2] 刘宁[1] 刘慧[3] 凌浪生[2] 张蕾[2] 张昌锦[2] 张裕恒 

机构地区：[1]安徽工程大学机械与汽车工程学院,安徽芜湖241000 [2]中国科学院合肥物质研究院强磁场科学中心,中国合肥230031 [3]合肥学院数学与物理系,中国合肥230601

出　　处：《低温物理学报》2016年第3期16-22,共7页Low Temperature Physical Letters

基　　金：Project supported by the supported by the Nature Science Foundation of China(Grant nos.11174290,U1232142,U1332140);Anhui Provincial Natural Science Foundation(Grant no.1308085MA11)~~

摘　　要：近年来,烧绿石铱化物在凝聚态物理方面引起了越来越多的关注,原因是人们意识到铱化物在实现新型拓扑态方面具有很大的潜力.在本文中,我们详细介绍了Ca^(2+)和Mn^(4+)离子掺杂对Bi_2Ir_2O_7的晶格结构,电输运以及磁性质的影响,研究发现Ca^(2+),Mn^(4+)掺杂增强了体系的反铁磁性,并使电阻率发生了金属绝缘体转变.Because of the potential for realizing new topological states, pyrochlore iridates have recently attracted growing interest in condensed matter physics In this paper we report a systematic study of Bi2 Ir2O7 by doping Ca2＋ and Mn4＋ ion. The crystal structure, electrical transport and magnetic properties were performed. We found that the antiferromagnetism was enhanced and metal-insulator transition was induced in both doped systems.

关 键 词：Bi2Ir2O7 金属绝缘体转变 掺杂 

分 类 号：O469[理学—凝聚态物理]