Control of the Half-Skyrmion Hall Effect and Its Application to Adder–Subtractor

Seungmo Yang, Kyoung Woong Moon, Changsoo Kim, Duck Ho Kim, Jeonghun Shin, Jinpyo Hong, Se Kwon Kim, Chanyong Hwang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Skyrmions have attracted a great attention in spintronics because of their potential use as robust information carriers with distinctive protection. Though the realization of skyrmion-based devices requires flexible control of a skyrmion motion, achieving such a skyrmion motion has been hampered by the skyrmion Hall effect (SkHE), which refers to the presence of a finite angle between a current and the skyrmion trajectory. Here, new insight for the precise control of half-skyrmion motion is presented, including complete suppression of the SkHE by deforming the internal structure of skyrmions, which is experimentally achieved by external magnetic field to steer current-driven half-skyrmions in the desired direction. Furthermore, based on the unique advantages in half-skyrmions, the potential of half-skyrmions application beyond skyrmion-based electronics is also demonstrated by presenting simple half-skyrmion-based addition/subtraction operation. The findings of controllability of 2D half-skyrmion motion will provide new perspectives on utilization of topological solitons for device applications.

Original languageEnglish
Article number2000060
JournalAdvanced Quantum Technologies
Volume4
Issue number1
DOIs
StatePublished - 2021 Jan

Keywords

  • adder
  • half-skyrmions
  • skyrmion Hall effect
  • skyrmions
  • subtractor

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