中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 合肥物质科学研究院
  3. 中国科学院合肥物质科学研究院
Pressure-induced anomalous insulating behavior in frustrated iridate La3Ir3O11 *

文献类型：期刊论文

作者Chen, Chun-Hua2,4; Zhou, Yong-Hui2; Zhou, Ying3; Yuan, Yi-Fang2,4; An, Chao3; Chen, Xu-Liang2; Tian, Zhao-Ming5,6; Yang, Zhao-Rong1,2,3
刊名CHINESE PHYSICS B
出版日期2021-06-01
卷号30
关键词high pressure 5d iridates semimetal-insulator transition crystal structure
ISSN号1674-1056
DOI10.1088/1674-1056/abf100
通讯作者Zhou, Yong-Hui(yhzhou@hmfl.ac.cn) ; Yang, Zhao-Rong(zryang@issp.ac.cn)
英文摘要The geometrically frustrated iridate La3Ir3O11 with strong spin-orbit coupling and fractional valence was recently predicted to be a quantum spin liquid candidate at ambient conditions. Here, we systematically investigate the evolution of structural and electronic properties of La3Ir3O11 under high pressure. Electrical transport measurements reveal an abnormal insulating behavior rather than metallization above a critical pressure P (c) similar to 38.7 GPa. Synchrotron x-ray diffraction (XRD) experiments indicate the stability of the pristine cubic KSbO3-type structure up to 73.1 GPa. Nevertheless, when the pressure gradually increases across P (c), the bulk modulus gets enhanced and the pressure dependence of bond length d (Ir - Ir) undergoes a slope change. Consistent with the XRD data, detailed analyses of Raman spectra reveal an abnormal redshift of Raman mode and a change of Raman intensity around P (c). Our results demonstrate that the pressure-induced insulating behavior in La3Ir3O11 can be assigned to the structural modification, such as the distortion of IrO6 octahedra. These findings will shed light on the emergent abnormal insulating behavior in other 5d iridates reported recently.
WOS关键词X-RAY-DIFFRACTION ; STATE ; PHYSICS
资助项目High Magnetic Field Laboratory of Anhui Province
WOS研究方向Physics
语种英语
WOS记录号WOS:000662671100001
出版者IOP PUBLISHING LTD
资助机构High Magnetic Field Laboratory of Anhui Province
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123802]  
专题中国科学院合肥物质科学研究院
通讯作者Zhou, Yong-Hui; Yang, Zhao-Rong
作者单位1.High Magnet Field Lab Anhui Prov, Hefei 230031, Peoples R China
2.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
3.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China
4.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China
5.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
6.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Chun-Hua,Zhou, Yong-Hui,Zhou, Ying,et al. Pressure-induced anomalous insulating behavior in frustrated iridate La3Ir3O11 *[J]. CHINESE PHYSICS B,2021,30.
APA Chen, Chun-Hua.,Zhou, Yong-Hui.,Zhou, Ying.,Yuan, Yi-Fang.,An, Chao.,...&Yang, Zhao-Rong.(2021).Pressure-induced anomalous insulating behavior in frustrated iridate La3Ir3O11 *.CHINESE PHYSICS B,30.
MLA Chen, Chun-Hua,et al."Pressure-induced anomalous insulating behavior in frustrated iridate La3Ir3O11 *".CHINESE PHYSICS B 30(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。