文献类型：期刊文献

英文题名：Tunable semimetallic state in compressive-strained SrIrO3 films revealed by transport behavior

作者：Zhang, Lunyong[1,2];Liang, Qifeng[3];Xiong, Ye[4];Zhang, Binbin[1,2];Gao, Lei[5];Li, Handong[5];Chen, Y. B.[1,6];Zhou, Jian[1,2];Zhang, Shan-Tao[1,2];Gu, Zheng-Bin[1,2];Yao, Shu-Hua[1,2];Wang, Zhiming[5];Lin, Yuan[5];Chen, Yan-Feng[1,2]

机构：[1]Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[2]Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[4]Nanjing Normal Univ, Coll Phys Sci & Technol, Nanjing 210093, Jiangsu, Peoples R China;[5]Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China;[6]Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

年份：2015

卷号：91

期号：3

外文期刊名：PHYSICAL REVIEW B

收录：SCI-EXPANDED(收录号：WOS:000348396800001)、、WOS

基金：The authors would like to acknowledge Professor D. Vanderbilt and Dr. Hongbin Zhang of Rutgers University and Professor Hae-Young Kee of the University of Toronto for their insightful discussions and suggestions in the modification of the manuscript. We also thank Professor Di Wu of Nanjing University for help with the film growth equipment. This work was financial supported by the State Key Program for Basic Research of China (2015CB921203), the Nation Science Foundation of China (11374149, 51032003, 50632030, 10974083, 51002074, 10904092), and the New Century excellent talents in University (NCET-09-0451). L.Z. also acknowledges the financial supports of the Nation Science Foundation of China (51402149), the China Postdoctoral Science Foundation (2013M530250), and the Jiangsu Province Postdoctoral Science Foundation (1202001C), as well as the Jiangsu Province Postdoctoral Sponsor Program.

语种：英文

外文摘要：Orthorhombic SrIrO3 is a typical spin-orbit-coupled correlated metal that shows diversified physical properties under external stimuli. Here the nonlinear Hall effect and weakly temperature-dependent resistance are observed in a SrIrO3 film epitaxially grown on a SrTiO3 substrate. It infers that orthorhombic SrIrO3 is a semimetal oxide. However, a linear Hall effect and insensitive-temperature-dependent resistance are observed in SrIrO3 films grown on (La, Sr)(Al, Ta) O-3 (LSAT) substrates, suggesting a tunable semimetallic state due to a band structure change in SrIrO3 films under different compressive strains. The mechanism of this evolution is explored in detail through a strain-state analysis by reciprocal space mapping and electron diffraction, carrier density and mobility calculations, as well as electronic band structure evolution under compressive strain (predicted by a tight-binding approximation). It might suggest that the strain-induced band shift leads to semimetallic tuning in the SrIrO3 film grown on SrTiO3 to LSAT substrates. Our findings illustrate the tunability of SrIrO3 properties and pave the way to induce different physical states in SrIrO3, such as the proposed topological insulator state in heterostructures.