Pressure-Induced Intermetallic Charge Transfer and Semiconductor-Metal Transition in Two-Dimensional AgRuO3

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外文摘要：The intricate correlation between charge degrees of freedom and physical properties is a fascinating area of research in solid state chemistry and condensed matter physics.Herein,we report on the pressure-induced successive charge transfer and accompanied resistive evolution in honeycomb layered ruthenate AgRuO3.Structural revisiting and spectroscopic anal-yses affirm the ilmenite type R-3 structure with mixed valence cations as Ag+1/+2Ru+4/+5O3 at ambient pres-sure.In-situ pressure-and temperature-dependent resistance variation reveals a successive insulator-metal-insulator transition upon pressing,accompa-nied by unprecedented charge transfer between Ag and Ru under applied pressure,and a further structur-al phase transition in the insulator region at higher pressure.These phenomena are also corroborated by in-situ pressure-dependent Raman spectra,syn-chrotron X-ray diffraction,bond valence sums,and electronic structure calculations,emphasizing the dominated rare Ag2+,and near zero thermal expansion in the ab-plane in the metallic zone mostly due to the Jahn-Teller effect of d9-Ag2+.The multiple electronic instabilities in AgRuO3 may offer new possibilities toward novel and unconventionally physical and chemical behaviors in strongly correlated honeycomb lattices.

外文关键词：

intermetallic charge transfersemiconduc-tor-metal transitionhoneycomb layered ruthenateshigh pressure

作者：

Chuanhui Zhu、Jinjin Yang、Pengfei Shan、Mei-Huan Zhao、Shuang Zhao、Cuiying Pei、Bowen Zhang、Zheng Deng、Mark Croft、Yanpeng Qi、Lihong Yang、Yonggang Wang、Xiaojun Kuang、Long Jiang、Dao-Xin Yao、Jin-Guang Cheng、Man-Rong Li

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作者单位：

Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,School of Chemistry,Sun Yat-sen University,Guangzhou 510275

Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190

School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210

College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541004

Department of Physics and Astronomy,Rutgers,The State University of New Jersey,Piscataway,NJ 08854

ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210

Shanghai Key Laboratory of High-Resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210

Center for High Pressure Science and Technology Advanced Research(HPSTAR),Beijing 100094

Guangdong Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-sen University,Guangzhou 510275

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基金：

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Program for Guangdong Introducing Innovative and Entrepreneurial TeamsProgram for Guangdong Introducing Innovative and Entrepreneurial TeamsProgram for Guangdong Introducing Innovative and Entrepreneurial Teams

项目编号：

NSFC-2209004121875287U19322171197424612004252120254081192100411974432921652042017ZT07C069NKRDPC-2017YFA0206203NKRDPC-2018YFA0306001

出版年：

2023

DOI：

10.31635/ccschem.022.202201989

中国化学会会刊(英文)

CSCD

ISSN：

年,卷(期)：2023.5(4)

参考文献量64