Coexistence of unconventional spin Hall effect and antisymmetric planar Hall effect in IrO2
Abstract
Crystal symmetry plays an important role in the Hall effects. Unconventional spin Hall effect (USHE), characterized by Dresselhaus and out-of-plane spins, has been observed in materials with low crystal symmetry. Recently, antisymmetric planar Hall effect (APHE) was discovered in rutile RuO2 and IrO2 (101) thin films, which also exhibit low crystal symmetry. In this study, we report the observation of both USHE and APHE in IrO2 (111) films, using spin-torque ferromagnetic resonance and harmonic Hall measurements, respectively. Notably, the unconventional spin-torque efficiency from Dresselhaus spin was more than double that of a previous report. Additionally, the temperature dependence of APHE suggests that it arises from the Lorentz force, constrained by crystal symmetry. Symmetry analysis supports the coexistence of USHE and APHE and demonstrates that both originate from the crystal symmetry of IrO2 (111), paving the way for a deeper understanding of Hall effects and related physical phenomena.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (12)
Yifei Yang
Key Laboratory of Ocean Observation and Forecasting, Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences
Sreejith Nair
Yihong Fan
Department of Electrical and Computer Engineering, University of Minnesota 1 , Twin Cities, Minneapolis, Minnesota 55455,
Yu-Chia Chen
Qi Jia
Onri Jay Benally
Department of Electrical and Computer Engineering, University of Minnesota 1 , 200 Union St. SE, Minneapolis, Minnesota 55455,
Seungjun Lee
Department of Electrical and Computer Engineering, University of Minnesota−Twin Cities
Seung Gyo Jeong
Department of Chemical Engineering and Materials Science, University of Minnesota−Twin Cities
Zhifei Yang
Department of Chemical Engineering and Materials Science, University of Minnesota−Twin Cities
Tony Low
Department of Electrical and Computer Engineering, University of Minnesota−Twin Cities
Bharat Jalan
Department of Chemical Engineering and Materials Science, University of Minnesota−Twin Cities
Jian-Ping Wang
Department of Electrical and Computer Engineering, University of Minnesota 1 , Twin Cities, Minneapolis, Minnesota 55455,