Controlling the topological sector of magnetic solitons in exfoliated Cr${}_{1/3}$NbS${}_2$ crystals

Abstract

We investigate manifestations of topological order in monoaxial helimagnet Cr${}_{1/3}$NbS${}_2$ by performing transport measurements on ultra-thin crystals. Upon sweeping the magnetic field perpendicularly to the helical axis, crystals thicker than one helix pitch (48 nm) but much thinner than the magnetic domain size ($\sim$1 $\mu$m) are found to exhibit sharp and hysteretic resistance jumps. We show that these phenomena originate from transitions between topological sectors with different number of magnetic solitons. This is confirmed by measurements on crystals thinner than 48 nm --in which the topological sector cannot change-- that do not exhibit any jump or hysteresis. Our results show the ability to deterministically control the topological sector of finite-size Cr${}_{1/3}$NbS${}_2$ and to detect inter-sector transitions by transport measurements.

arXiv comment7 pages, 8 figures

References in corpus (6)

• Topological insulators and superconductors
• Magnetic phase transitions in single crystals of the chiral helimagnet Cr1/3NbS2
• Discrete helicoidal states in chiral magnetic thin films
• Magnetic soliton transport over topological spin texture in chiral helimagnet with strong easy-plane anisotropy
• Out-of-Plane Spin-Orientation Dependent Magnetotransport Properties in the Anisotropic Helimagnet Cr${}_{1/3}$NbS${}_2$
• Spin Structure of the Anisotropic Helimagnet Cr${}_{1/3}$NbS${}_2$ in a Magnetic Field

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