Electrical probing of field-driven cascading quantized transitions of skyrmion cluster states in MnSi nanowires

被引：87

作者：

Du, Haifeng ^{[1
]}

Liang, Dong ^{[2
]}

Jin, Chiming ^{[1
]}

Kong, Lingyao ^{[3
]}

Stolt, Matthew J. ^{[2
]}

Ning, Wei ^{[1
]}

Yang, Jiyong ^{[1
]}

Xing, Ying ^{[4
]}

Wang, Jian ^{[4
]}

Che, Renchao ^{[5
]}

Zang, Jiadong ^{[6
,7
,8
,9
]}

Jin, Song ^{[2
]}

Zhang, Yuheng ^{[1
,10
]}

Tian, Mingliang ^{[1
,10
]}

机构：

[1] Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China

[2] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

[3] China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Sichuan Provinc, Peoples R China

[4] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[5] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[6] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[7] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[8] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[9] Univ New Hampshire, Mat Sci Program, Durham, NH 03824 USA

[10] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

NATURE COMMUNICATIONS | 2015年 / 6卷

基金：

美国国家科学基金会;

关键词：

LATTICE; DYNAMICS; MOTION;

D O I：

10.1038/ncomms8637

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnetic skyrmions are topologically stable whirlpool-like spin textures that offer great promise as information carriers for future spintronic devices. To enable such applications, particular attention has been focused on the properties of skyrmions in highly confined geometries such as one-dimensional nanowires. Hitherto, it is still experimentally unclear what happens when the width of the nanowire is comparable to that of a single skyrmion. Here, we achieve this by measuring the magnetoresistance in ultra-narrow MnSi nanowires. We observe quantized jumps in magnetoresistance versus magnetic field curves. By tracking the size dependence of the jump number, we infer that skyrmions are assembled into cluster states with a tunable number of skyrmions, in agreement with the Monte Carlo simulations. Our results enable an electric reading of the number of skyrmions in the cluster states, thus laying a solid foundation to realize skyrmion-based memory devices.

引用

页数：7

共 32 条

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