Nematic and smectic stripe phases and stripe-Sk X transformations  

作　　者：Hai-Tao Wu Xu-Chong Hu X.R.Wang 

机构地区：[1]Department of Physics,The Hong Kong University of Science and Technology,Hong Kong 999077,China [2]HKUST Shenzhen Research Institute,Shenzhen 518057,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2022年第4期112-119,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2018YFB0407600,and 2020YFA0309600);the National Natural Science Foundation of China(Grant Nos.11974296;11774296);Hong Kong Research Grant Council(Grant Nos.16301518,and 16301619);。

摘　　要：Based on the findings of skyrmion nature of stripes and the metastability of a state of an arbitrary number of skyrmions,precisely controlled manipulation of stripes of skyrmion number 1 in pre-designed structures and mutual transformation between helical states and skyrmion crystals(Sk Xs)are demonstrated in chiral magnetic films.As a proof of the concept,we show how to use patterned magnetic fields and spin-transfer torques(STTs)to generate nematic and smectic stripe phases,as well as“UST”mosaic from three curved stripes.Cutting one stripe into many pieces and coalescing several skyrmions into one by various external fields are good ways to transform helical states and Sk Xs from each other.

关 键 词：SPINTRONIC Landau-Lifshitz-Gilbert equation simulation stripe skyrmion skyrmion crystal nematic phase 

分 类 号：O469[理学—凝聚态物理]