2021/11/30 by Kang He, Jun Cheng, Man Yang +10 · 14 citations
Physics and Astronomy · #Condensed matter physics #Electron #Geometry #Magnetic field #Magnetic properties of thin films #Materials science #Physics #Physics of Superconductivity and Magnetism #Planar #Quantum and electron transport phenomena #Quantum mechanics #Rectification #Reversing #SIGNAL (programming language) #Sign (mathematics) #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Spin pumping #Spinplasmonics #Spurious relationship #Symmetry (geometry) #Voltage #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.1103/physrevb.105.104406
published in Physical review. B./Physical review. B 105(10) (American Physical Society)
arxiv created 2022/01/06 · openalex publication_date 2022/03/07 · arxiv updated 2022/03/08 · openalex created_date 2022/04/03 · openalex updated_date 2026/06/11
Spin pumping is a technique widely used to generate the pure spin current and characterize the spin-charge conversion in various systems. The reversing sign of the symmetric Lorentzian charge current with respect to opposite magnetic field is generally accepted as the key criterion to identify its pure spin current origin. However, we herein find that the rectified voltage due to the planar Hall effect can exhibit similar spurious signal, complicating and even misleading the analysis. The distribution of microwave magnetic field and induction current has strong influence on the magnetic field symmetry and lineshape of the obtained signal. We further demonstrate a geometry where the spin-charge conversion and the rectified voltage can be readily distinguished with a straightforward symmetry analysis.