Conductance in the Helimagnet- and Skyrmion-Lattice-Embedded Electron Waveguide

Abstract

The helimagnet (HM) and skyrmion lattice (SL) are topologically nontrivial magnetic states. Their spin texture gives rise to finite topological magnetic field and Lorentz force. As a demonstration of the emergent electrodynamics besides the Hall effect, the transmission of electrons within a waveguide (WG) embedded with a HM/SL layer is shaped by the topological spin texture. In this work, we investigated the conductance properties in the HM/SL-film-embedded electron WG and found that under translation of the HM/SL layer the conductance contour as a function of the layer center demonstrates nearly identical pattern to the original spin field contour. When an electron transports in the WG, the topological magnetic field generalized by the HM/SL spin texture exerts on it and distorts the wavefunction shape in the x-y plane. By interference between different quantum paths the electron experiences, the HM/SL spin texture is recorded in the conductance. The scheme also provides a possible detect of the HM/SL spin configuration by transport experiment.