Emergent inductance by dynamical Aharonov-Casher phases

TL;DR

This paper introduces a new form of inductance driven by dynamical Aharonov-Casher phases in ferromagnets, extending the concept to various magnetic textures with potential applications in spintronics.

Contribution

It generalizes the theory of emergent inductance to include dynamical AC phases in systems with spin-orbit coupling and uniform magnetization, broadening the scope of AC phase physics.

Findings

Universal emergence of inductance from dynamical AC phases in magnetic systems.

Applicability to ferromagnets with spatial inversion asymmetry.

Potential for spintronics power management in ultra-wideband frequencies.

Abstract

We propose a mechanism of inductance operation originating from a dynamical Aharonov-Casher (AC) phase of an electron in ferromagnets. By taking into account spin-orbit coupling effects, we extend the theory of emergent inductance, which has recently been discovered in spiral magnets, to arbitrary magnetic textures. The inductance of dynamical AC phase origin universally arises in the coexistence of magnetism and a spin-orbit coupling, even with spatially-uniform magnetization, allowing its stable operation in wide ranges of temperature and frequency. Revisiting the widely studied systems, such as ferromagnets with spatial inversion asymmetry, with the new perspective offered by our work will lead to opening a new paradigm in the study of AC phase physics and the spintronics-based power management in ultra-wideband frequency range.