Impurity-induced orbital magnetization in a Rashba electron gas

Abstract

We investigate the induced orbital magnetization density in a Rashba electron gas with magnetic impurities. Relying on classical electrodynamics, we obtain this quantity through the bound currents composed of a paramagnetic and a diamagnetic-like contribution which emerge from the spin-orbit interaction. Similar to Friedel charge ripples, the bound currents and the orbital magnetization density oscillate as function of distance away from the impurity with characteristic wavelengths defined by the Fermi energy and the strength of the Rashba spin-orbit interaction. The net induced orbital magnetization was found to be of the order of magnitude of its spin counterpart. Besides the exploration of the impact of the electronic filling of the impurity states, we investigate and analyze the orbital magnetization induced by an equilateral frustrated trimer in various non-collinear magnetic states. On the one hand, we confirm that non-vanishing three-spin chiralities generate a finite orbital magnetization density. On the other hand, higher order contributions lead to multiple-spin chiralities affecting non-trivially and significantly the overall magnitude and sign of the orbital magnetization.

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Cited by in corpus (4)

• Impurity-induced Friedel oscillations in altermagnets and $p$-wave magnets
• Transverse Transport in Two-Dimensional Relativistic Systems with Non-Trivial Spin Textures
• Spin, atomic and inter-atomic orbital magnetism induced by 3d nanostructures deposited on transition metal surfaces
• Numerical Study of Disorder on the Orbital Magnetization in Two Dimensions