Pressure-induced ionic–polaronic–ionic transition in LaAlO3

doi:10.1063/5.0155704

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	Pressure-induced ionic–polaronic–ionic transition in LaAlO3
	X. X. Zhao, J. Q. Cai, D. W. Jiang, M. Cao, L. Zhao and Y. H. Han
	2023
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	122 期号:26 页码:5
摘要	Combining alternate-current impedance spectrum measurement and first-principle calculations, we thoroughly analyzed the electrical transport behavior of LaAlO3 under high pressure. A pressure-induced ionic-polaronic-ionic transition has been discovered through impedance spectroscopy measurements. Through first-principle calculations, we have elucidated the physical origin of the emergence of polaronic conduction, which results from the distortion of electron density background around Al and O atoms. Furthermore, the discontinuous changes in the starting frequency of ion migration f(W), relaxation frequency f(b), and ionic resistance R-i have been found at around 13.2 GPa, which can be ascribed to the phase transition of LaAlO3 from rhombohedral to cubic phase. Pressure can enhance the migration of O2- ions, causing an increase in the ionic conductivity of LaAlO3. This research will deepen our comprehension on the ion migration in solid electrolytes.
DOI	10.1063/5.0155704
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收录类别	sci
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68245
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X. X. Zhao, J. Q. Cai, D. W. Jiang, M. Cao, L. Zhao and Y. H. Han. Pressure-induced ionic–polaronic–ionic transition in LaAlO3[J]. Applied Physics Letters,2023,122(26):5.
APA	X. X. Zhao, J. Q. Cai, D. W. Jiang, M. Cao, L. Zhao and Y. H. Han.(2023).Pressure-induced ionic–polaronic–ionic transition in LaAlO3.Applied Physics Letters,122(26),5.
MLA	X. X. Zhao, J. Q. Cai, D. W. Jiang, M. Cao, L. Zhao and Y. H. Han."Pressure-induced ionic–polaronic–ionic transition in LaAlO3".Applied Physics Letters 122.26(2023):5.

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