Monte Carlo study of magnetoresistance in a chiral soliton lattice

Abstract

Monoaxial chiral magnets can form a peculiar noncollinear spin structure called the chiral soliton lattice in an applied magnetic field perpendicular to the helical axis. We study magnetic properties and electrical transport in the chiral soliton lattice by a Monte Carlo simulation for a one-dimensional Kondo lattice model including the Dzyaloshinskii-Moriya interaction between classical localized spins. We show that the model exhibits a helical spin structure at a zero magnetic field, which turns into the chiral soliton lattice, and finally, to a forced ferromagnetic state with increasing the external magnetic field. In the chiral soliton lattice state, we find negative magnetoresistance proportional to the number of solitons at low temperature, which corroborates the spin scattering of electrons by chiral solitons. We also discuss the temperature and magnetic field dependence of the spin structure factor and electrical resistivity, in comparison with experiments for CrNb${}_3$S${}_6$.

5 pages, 4 figures

References in corpus (7)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Vortex Crystals with Chiral Stripes in Itinerant Magnets
• Finite-Temperature Properties of Three-Dimensional Classical Chiral Helimagnets
• Theory of spin current in chiral helimagnet
• Understanding the H-T phase diagram of the mono-axial helimagnet
• Transport magnetic currents driven by moving kink crystal in chiral helimagnets
• Phase transitions and ordering structures of a model of chiral helimagnet in three dimensions

Cited by in corpus (7)

• Spin excitation spectra in helimagnetic states: proper-screw, cycloid, vortex crystal, and hedgehog lattice
• Magnetic field-temperature phase diagrams for multiple-$Q$ magnetic orderings: Exact steepest descent approach to long-range interacting spin systems
• Theory of magnetoelastic resonance in a mono-axial chiral helimagnet
• Lock-in of a Chiral Soliton Lattice by Itinerant Electrons
• Chiral helimagnetic state in a Kondo lattice model with the Dzyaloshinskii-Moriya interaction
• Soliton penetration from edges in a monoaxial chiral magnet
• Spin-current diode with a monoaxial chiral magnet