High-efficiency energy harvesting based on nonlinear Hall rectifier

Abstract

Noncentrosymmetric quantum materials can convert AC input current into DC transverse current through the nonlinear Hall effect at zero magnetic field. We analyze the AC-DC power conversion efficiency of such ``Hall rectifier'' and suggest its application in wireless charging and energy harvesting. Our key observation is that the development of Hall voltage results in a change of longitudinal resistance, resulting in a violation of Ohm's law due to the nonlinear Hall effect. This feedback mechanism balances the input power and the output power and hence is crucial to understanding the power transfer from source to load. We derive a general expression for the power conversion efficiency in terms of material parameters, external load resistance, and input power. As the Hall current is perpendicular to the electric field and does not generate Joule heating by itself, we obtain high power conversion efficiency when the Hall angle (which increases with the input power) is large and the load resistance is optimized. Promising materials for high-efficiency Hall rectifiers are also discussed.

7 pages, 3 figures

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Cited by in corpus (8)

• Non-linear Transport in Non-centrosymmetric Systems: From Fundamentals to Applications
• Equivalence of semiclassical and response theories for second-order nonlinear ac Hall effects
• Transverse Cooper-Pair Rectifier
• Two-Terminal Electrical Detection of the Néel Vector via Longitudinal Antiferromagnetic Nonreciprocal Transport
• Orbital magnetization as the origin of the nonlinear Hall effect
• Visible and Terahertz Nonlinear Responses in the Topological Noble Metal Dichalcogenide PdTe2
• Evidence of Spin-Valley Coupling in Dirac Material BaMnBi2 Probed by Quantum Hall Effect and Nonlinear Hall Effect
• AC Current-Driven Magnetization Switching and Nonlinear Hall Rectification in a Magnetic Topological Insulator