Anisotropic Friedel oscillations inside the domain wall

TL;DR

This paper theoretically investigates how non-collinear magnetic configurations in Neel domain walls influence Friedel oscillations, revealing anisotropic charge distributions and dielectric properties that can be experimentally measured to determine domain wall orientation.

Contribution

It introduces a theoretical framework connecting magnetic configuration anisotropy with electric charge and dielectric responses in domain walls, enabling experimental detection of DW orientation.

Findings

Magnetic configuration affects induced charge distribution.

Anisotropy in dielectric function relates to DW orientation.

Charge and dielectric anisotropies are measurable experimentally.

Abstract

The influence of the non-collinear magnetic configuration on Friedel is investigated theoretically. Specifically the influence of the magnetic configuration on the induced electric charge in a N\'{e}el type domain wall (DW) has been obtained. The well-known Levy and Zhang eigenstates for a linear DW have been employed. Then the dielectric function of this magnetic system has been obtained within the random phase approximation. Results of the current work demonstrated that magnetic configuration of the system manifests itself in the electric properties such as induced charge distribution. Meanwhile the anisotropy of the induced charge distribution in the real space provides a measurable way for the determination of the DW orientation. In addition anisotropy of the dielectric function in k-space arises as a result of the anisotropy of the magnetic configuration. Therefore the orientation of the magnetic DW could also be captured by full optical measurements.