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DOI	10.1073/pnas.1812822116
	Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design
	Nan T.; Anderson T.J.; Gibbons J.; Hwang K.; Campbell N.; Zhou H.; Dong Y.Q.; Kim G.Y.; Shao D.F.; Paudel T.R.; Reynolds N.; Wang X.J.; Sun N.X.; Tsymbal E.Y.; Choi S.Y.; Rzchowski M.S.; Kim Y.B.; Ralph D.C.; Eom C.B.
发表日期	2019
ISSN	0027-8424
起始页码	16186
结束页码	16191
卷号	116 期号:33
英文摘要	Spin-orbit coupling (SOC), the interaction between the electron spin and the orbital angular momentum, can unlock rich phenomena at interfaces, in particular interconverting spin and charge currents. Conventional heavy metals have been extensively explored due to their strong SOC of conduction electrons. However, spin-orbit effects in classes of materials such as epitaxial 5d-electron transition-metal complex oxides, which also host strong SOC, remain largely unreported. In addition to strong SOC, these complex oxides can also provide the additional tuning knob of epitaxy to control the electronic structure and the engineering of spin-to-charge conversion by crystalline symmetry. Here, we demonstrate room-temperature generation of spin-orbit torque on a ferromagnet with extremely high efficiency via the spin-Hall effect in epitaxial metastable perovskite SrIrO3. We first predict a large intrinsic spin-Hall conductivity in orthorhombic bulk SrIrO3 arising from the Berry curvature in the electronic band structure. By manipulating the intricate interplay between SOC and crystalline symmetry, we control the spin-Hall torque ratio by engineering the tilt of the corner-sharing oxygen octahedra in perovskite SrIrO3 through epitaxial strain. This allows the presence of an anisotropic spin-Hall effect due to a characteristic structural anisotropy in SrIrO3 with orthorhombic symmetry. Our experimental findings demonstrate the heteroepitaxial symmetry design approach to engineer spin-orbit effects. We therefore anticipate that these epitaxial 5d transition-metal oxide thin films can be an ideal building block for low-power spintronics. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Epitaxial thin films; Spin-Hall effect; Spin-orbit torque; SrIrO3
语种	英语
scopus关键词	heavy metal; oxygen; anisotropy; Article; controlled study; electric conductivity; electron spin resonance; priority journal; room temperature; scanning transmission electron microscopy; synchrotron radiation; torque
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160357
作者单位	Nan, T., Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, WI 53706, United States; Anderson, T.J., Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, WI 53706, United States; Gibbons, J., Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853, United States; Hwang, K., Department of Physics and Centre for Quantum Materials, University of Toronto, Toronto, ON M5S 1A7, Canada; Campbell, N., Department of Physics, University of Wisconsin–Madison, Madison, WI 53706, United States; Zhou, H., Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States; Dong, Y.Q., Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States; Kim, G.Y., Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea; Shao, D.F., Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscien...
推荐引用方式 GB/T 7714	Nan T.,Anderson T.J.,Gibbons J.,et al. Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design[J],2019,116(33).
APA	Nan T..,Anderson T.J..,Gibbons J..,Hwang K..,Campbell N..,...&Eom C.B..(2019).Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design.Proceedings of the National Academy of Sciences of the United States of America,116(33).
MLA	Nan T.,et al."Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design".Proceedings of the National Academy of Sciences of the United States of America 116.33(2019).