当前位置: X-MOL 学术npj Quant. Mater. › 论文详情
Lattice frustration in spin-orbit Mott insulator Sr 3 Ir 2 O 7 at high pressure
npj Quantum Materials Pub Date : 2019-05-23 , DOI: 10.1038/s41535-019-0162-3
Jianbo Zhang, Dayu Yan, Sorb Yesudhas, Hongshan Deng, Hong Xiao, Bijuan Chen, Raimundas Sereika, Xia Yin, Changjiang Yi, Youguo Shi, Zhenxian Liu, Ekaterina M. Pärschke, Cheng-Chien Chen, Jun Chang, Yang Ding, Ho-kwang Mao

The intertwined charge, spin, orbital, and lattice degrees of freedom could endow 5d compounds with exotic properties. Current interest is focused on electromagnetic interactions in these materials, whereas the important role of lattice geometry remains to be fully recognized. For this sake, we investigate pressure-induced phase transitions in the spin-orbit Mott insulator Sr3Ir2O7 with Raman, electrical resistance, and x-ray diffraction measurements. We reveal an interesting magnetic transition coinciding with a structural transition at 14.4 GPa, but without a concurrent insulator-metal transition. The conventional correlation between magnetic and Mott insulating states is thereby absent. The observed softening of the one-magnon mode can be explained by a reduced tetragonal distortion, while the actual magnetic transition is associated with tilting of the IrO6 octahedra. This work highlights the critical role of lattice frustration in determining the high-pressure phases of Sr3Ir2O7. The ability to control electromagnetic properties via manipulating the crystal structure with pressure promises a new way to explore new quantum states in spin-orbit Mott insulators.
更新日期:2019-11-18

 

全部期刊列表>>
Springer Nature 2019高下载量文章和章节
化学/材料学中国作者研究精选
《科学报告》最新环境科学研究
ACS材料视界
自然科研论文编辑服务
中南大学国家杰青杨华明
南开大学陈弓课题组招聘启事
中南大学
材料化学和生物传感方向博士后招聘
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug