Tuning the J(eff)=1/2 insulating state via electron doping and pressure in the double-layered iridate Sr3Ir2O7
文献类型：期刊论文
| 作者 | Li, L ; Kong, PP ; Qi, TF ; Jin, CQ ; Yuan, SJ ; DeLong, LE ; Schlottmann, P ; Cao, G |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2013 |
| 卷号 | 87期号:23 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Cao, G (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA. |
| 中文摘要 | Sr3Ir2O7 exhibits a novel J(eff) = 1/2 insulating state that features a splitting between Jeff = 1/2 and 3/2 bands due to spin-orbit interaction. We report a metal-insulator transition in Sr3Ir2O7 via either dilute electron doping (La3+ for Sr2+) or application of high pressure up to 35 GPa. Our study of single-crystal Sr3Ir2O7 and (Sr1-xLax)(3)Ir2O7 reveals that application of high hydrostatic pressure P leads to a drastic reduction in the electrical resistivity by as much as six orders of magnitude at a critical pressure P-C = 13.2 GPa, manifesting a closing of the gap; but further increasing P up to 35 GPa produces no fully metallic state at low temperatures, possibly as a consequence of localization due to a narrow distribution of bonding angles theta. In contrast, slight doping of La3+ ions for Sr2+ ions in Sr3Ir2O7 readily induces a robust metallic state in the resistivity at low temperatures; the magnetic ordering temperature is significantly suppressed but remains finite for (Sr0.95La0.05)(3)Ir2O7 where the metallic state occurs. The results are discussed along with comparisons drawn with Sr2IrO4, a prototype of the J(eff) = 1/2 insulator. |
| 资助信息 | US National Science Foundation [DMR-0856234, EPS-0814194]; US Department of Energy Office of Science, Basic Energy Sciences [DE-FG02-97ER45653]; US Dept. of Energy [DE-FG02-98ER45707] |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57635]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li, L,Kong, PP,Qi, TF,et al. Tuning the J(eff)=1/2 insulating state via electron doping and pressure in the double-layered iridate Sr3Ir2O7[J]. PHYSICAL REVIEW B,2013,87(23). |
| APA | Li, L.,Kong, PP.,Qi, TF.,Jin, CQ.,Yuan, SJ.,...&Cao, G.(2013).Tuning the J(eff)=1/2 insulating state via electron doping and pressure in the double-layered iridate Sr3Ir2O7.PHYSICAL REVIEW B,87(23). |
| MLA | Li, L,et al."Tuning the J(eff)=1/2 insulating state via electron doping and pressure in the double-layered iridate Sr3Ir2O7".PHYSICAL REVIEW B 87.23(2013). |
入库方式： OAI收割
来源：物理研究所
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