Orbital magnetic dynamics in chiral p-wave superconductors

TL;DR

This paper develops a theoretical framework for understanding orbital magnetic dynamics in chiral p-wave superconductors, highlighting differences from spin ferromagnets and exploring implications for magnetization waves and domain structures.

Contribution

It introduces a novel theory for orbital magnetic dynamics in chiral p-wave superconductors, emphasizing the non-local nature of orbital magnetism.

Findings

Orbital magnetization cannot be described by local magnetization density.

The theory predicts unique behaviors of orbital magnetization waves.

Domain structure energy is analyzed within this new framework.

Abstract

We present a theory of orbital magnetic dynamics for a chiral p-wave superconductor with broken time-reversal symmetry. In contrast to the common Landau-Lifshitz theory for spin ferromagnets, the case of orbital magnetism cannot be described in terms of local magnetization density. Hence it is impossible to define unambiguously the spontaneous magnetic moment: the latter would depend on conditions of its experimental investigation. As an example of this we consider orbital magnetization waves and the domain structure energy.