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Pressure-induced anomalous insulating behavior in frustrated iridate La3Ir3O11 *
Chen, Chun-Hua1,2; Zhou, Yong-Hui1; Zhou, Ying3; Yuan, Yi-Fang1,2; An, Chao3; Chen, Xu-Liang1; Tian, Zhao-Ming4,5; Yang, Zhao-Rong1,3,6
2021-06-01
Source PublicationCHINESE PHYSICS B
ISSN1674-1056
Corresponding AuthorZhou, Yong-Hui(yhzhou@hmfl.ac.cn) ; Yang, Zhao-Rong(zryang@issp.ac.cn)
AbstractThe 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.
Keywordhigh pressure 5d iridates semimetal-insulator transition crystal structure
DOI10.1088/1674-1056/abf100
WOS KeywordX-RAY-DIFFRACTION ; STATE ; PHYSICS
Indexed BySCI
Language英语
Funding ProjectHigh Magnetic Field Laboratory of Anhui Province
Funding OrganizationHigh Magnetic Field Laboratory of Anhui Province
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000662671100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/123803
Collection中国科学院合肥物质科学研究院
Corresponding AuthorZhou, Yong-Hui; Yang, Zhao-Rong
Affiliation1.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China
3.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China
4.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
5.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
6.High Magnet Field Lab Anhui Prov, Hefei 230031, Peoples R China
Recommended Citation
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).
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