南方科技大学知识苑(SUSTech KC): Current-driven skyrmion motion in granular films

题名	Current-driven skyrmion motion in granular films
作者	Gong，Xin 1; Yuan，H. Y.2 ; Wang，X. R.1,3
发表日期	2020-02-01
DOI	10.1103/PhysRevB.101.064421
发表期刊	PHYSICAL REVIEW B 影响因子和分区
ISSN	2469-9950
EISSN	2469-9969
卷号	101 期号:6
摘要	Current-driven skyrmion motion in random granular films is investigated, with interesting findings. For a given current, there exists a critical disorder strength below which its transverse motion could either be boosted below a critical damping or be hindered above the critical damping, resulting in current and disorder dependences of the skyrmion Hall angle. The boosting comes mainly from the random force that is opposite to the driving force (current). The critical damping depends on the current density and disorder strength. However, the longitudinal motion of a skyrmion is always hindered by the disorder. Above the critical disorder strength, skyrmions are pinned. The disorder-induced random force on a skyrmion can be classified as static or kinetic, similar to the friction force in the Newtonian mechanics. In the pinning phase, the static (pinning) random force is against the tendency direction of skyrmion motion that is transverse to the current density for spin-transfer-torque-driven motion. The kinetic random force is opposite to the skyrmion velocity when skyrmions are in motion. Furthermore, we provide strong evidences that the Thiele equation can perfectly describe skyrmion dynamics in granular films. These findings provide insight into skyrmion motion and should be important for skyrmiontronics.
相关链接	[Scopus记录]
收录类别	SCI ; EI
语种	英语
学校署名	其他
资助项目	Shenzhen Fundamental Subject Research Program[JCYJ20180302174248595]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000514684300002
出版者	American Physical Society
EI入藏号	20200908224195
EI主题词	Friction
EI分类号	Mechanics:931.1
ESI学科分类	PHYSICS
Scopus记录号	2-s2.0-85079805038
来源库	Scopus
引用统计	被引频次[WOS]：44
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/85848
专题	理学院_物理系
作者单位	1.Physics Department,Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong 2.Department of Physics,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China 3.Hkust Shenzhen Research Institute,Shenzhen,518057,China
推荐引用方式 GB/T 7714	Gong，Xin,Yuan，H. Y.,Wang，X. R.. Current-driven skyrmion motion in granular films[J]. PHYSICAL REVIEW B,2020,101(6).
APA	Gong，Xin,Yuan，H. Y.,&Wang，X. R..(2020).Current-driven skyrmion motion in granular films.PHYSICAL REVIEW B,101(6).
MLA	Gong，Xin,et al."Current-driven skyrmion motion in granular films".PHYSICAL REVIEW B 101.6(2020).