Interface-driven electrical magnetochiral anisotropy in Pt/PtMnGa bilayers
arXiv:2011.03244 · doi:10.1063/5.0054662
Abstract
Nonreciprocal charge transport, which is frequently termed as electrical magnetochiral anisotropy (EMCA) in chiral conductors, touches the most important elements of modern condensed matter physics. Here, we have investigated the EMCA in Pt/PtMnGa (PMG) bilayers with the assitance of nonequilibrium fluctuation theorems. Large EMCA in the Pt/PMG bilayers can be attributed to nonreciprocal response of an interface-driven chiral transport channel. Due to the presence of large charge fluctuations for small current region, higher order EMCA coefficients should be added and they are all functions of current. A combination of asymmetrical electron scattering and spin-dependent scattering furnish the PMG thickness dependent chiral transport behaviors in Pt/PMG bilayers. The dramatically enhanced anomalous Hall angle of PMG further demonstrates the modified surface state properties by strong spin-orbit coupling.
References in corpus (23)
- Anomalous Hall effect
- Shot Noise in Mesoscopic Conductors
- Electrical switching of an antiferromagnet
- Nonequilibrium fluctuations, fluctuation theorems, and counting statistics in quantum systems
- Colloquium. Quantum Fluctuation Relations: Foundations and Applications
- Discovery of Magnetic Antiskyrmions Beyond Room Temperature in Tetragonal Heusler Materials
- Proper Scaling of the Anomalous Hall Effect
- Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
- Heusler, Weyl, and Berry
- Robust formation of skyrmions and topological Hall effect in epitaxial thin films of MnSi
- Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator
- Symmetry in Full Counting Statistics, Fluctuation Theorem, and Relations among Nonlinear Transport Coefficients in the Presence of a Magnetic Field
- Current-nonlinear Hall effect and spin-orbit torque magnetization switching in a magnetic topological insulator
- Magnetic-field asymmetry of nonlinear mesoscopic transport
- Electrical magnetochiral effect induced by chiral spin fluctuations
- Nonlinear planar Hall effect
- Non-equilibrium Fluctuation Relations in a Quantum Coherent Conductor
- Theory of unidirectional spin Hall magnetoresistance in heavy-metal/ferromagnetic-metal bilayers
- Observation of out-of-plane spin texture in a SrTiO3 (111) two-dimensional electron gas
- Anomalous electrical magnetochiral effect by chiral spin fluctuation
- Fluctuation Theorem and Microreversibility in a Quantum Coherent Conductor
- Rectification and nonlinear transport in chaotic dots and rings
- Interface-driven unusual anomalous Hall effect in MnxGa/Pt bilayers: No correlation with chiral spin structures