Anisotropic spin-orbit torque generation in epitaxial SrIrO 3 by symmetry design
Abstract
Modern spintronics operate based on the spin-to-charge interconversion, where charge current flowing through materials and interfaces with the strong spin-orbit interaction generates spin current via the spin-Hall effect. Here, we report the discovery of a class of intrinsic spin-Hall materials: 5 d transition-metal complex oxides. In these materials, a delicate interplay between spin-orbit coupling and electron correlation exists, which can lead to nontrivial spin-related quantum transport phenomena. In particular, we find that epitaxial perovskite SrIrO 3 thin films generate room-temperature spin currents via the spin-Hall effect more efficiently than those previously reported for elemental heavy metals. Furthermore, the efficiency can be modified by epitaxially tailoring the anisotropic SrIrO 3 crystalline symmetry, thus demonstrating a path toward engineering efficient room-temperature spintronics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 26, 2019
- Source ID
- 10.1073/pnas.1812822116
Entities
People
- Chang-Beom Eom
- D. C. Ralph
- D. F. Shao
- E. Y. Tsymbal
- G. Y. Kim
- Huibin Zhou
- Jonathan Gibbons
- Kyusung Hwang
- M. S. Rzchowski
- N. Campbell
- N. Reynolds
- N. X. Sun
- Nian X Sun
- S. Y. Choi
- T. Nan
- T. R. Paudel
- Travis J. Anderson
- Y. Q. Dong
- Yong Baek Kim
Organizations
- Air Force Office of Scientific Research
- Argonne National Laboratory
- Army Research Office
- Canadian Institute for Advanced Research
- Cornell University
- Korea Institute for Advanced Study
- National Science Foundation
- Northeastern University
- Office of Basic Energy Sciences
- Pohang University of Science and Technology
- University of Nebraska–Lincoln
- University of Toronto
- University of Wisconsin–Madison