文献类型：期刊文献

英文题名：Tunable semimetallic state in compressive-strained SrIr O3 films revealed by transport behavior

作者：Zhang L.; Liang Q.; Xiong Y.; Zhang B.; Gao L.; Li H.; Chen Y.B.; Zhou J.; Zhang S.-T.; Gu Z.-B.; Yao S.-H.; Wang Z.; Lin Y.; Chen Y.-F.

机构：[1]National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China;[2]Department of Physics, Shaoxing University, Shaoxing, 312000, China;[3]College of Physical Science and Technology, Nanjing Normal University, Nanjing, 210093, China;[4]State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China;[5]National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing, 210093, China

年份：2015

卷号：91

期号：3

外文期刊名：Physical Review B - Condensed Matter and Materials Physics

收录：Scopus(收录号：2-s2.0-84921047252)

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)O3 (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. ? 2015 American Physical Society.