Creation and erasure of polar bubble domains in PbTiO_(3)films by mechanical stress and light illuminations  

作　　者：Xingchen Zhang Hongying Chen Guo Tian Wenda Yang Zhen Fan Zhipeng Hou Deyang Chen Min Zeng Minghui Qin Jinwei Gao Xingsen Gao Jun-Ming Liu 

机构地区：[1]Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,510006,China [2]Laboratory of Solid-State Microstructures and Innovation Center of Advanced Microstructures,Nanjing University,Nanjing,210093,China [3]National Laboratory of Solid State Microstructures,Department of Materials Science and Engineering,Jiangsu Key Laboratory of Artificial Functional Materials,Nanjing University,Nanjing,210093,China

出　　处：《Journal of Materiomics》2023年第4期626-633,共8页无机材料学学报（英文）

基　　金：the financial support from the National Key Research and Development Programs of China(Grant Nos.2022YFB3807603);National Natural Science Foundation of China(Grant Nos.92163210,11674108,52002134,U22A20117);Funding by Science and Technology Projects in Guangzhou(202201000008);the Science and Technology Planning Project of Guangdong Province(No.2019KQNCX028);the Natural Science Foundation of South China Normal University(No.19KJ01).

摘　　要：The controllable manipulation of polar topological structures(e.g.skyrmion bubble)in ferroelectric materials have been considered as a cornerstone for future programmable nano-electronics.Here,we present the effective creation and erasure of polar bubble states PbTiO_(3)(PTO)multilayers trigged by mechanical stress and light illumination,respectively.It was found that applying atomic force microscope(AFM)tip force can induced formation of nanoscale bubble domains from the initial monodomain state.Moreover,the created bubble domain can be eliminated by exposure to ultraviolet or infrared light illumination.The above results can be understood by modulation of depolarization screening charges and bias fields,as reflected by scanning Kelvin potential microscopic(SKPM)observations,whereby the flexoelectric effect from the tip force tends to remove the screening charges on top surface and modulate the bias field that favors the formation of bubble state while light illumination tends to recover the screen charges and favor the monodomain state.The results provide a good example for multi-field manipulation of polar topologies,which might create a new avenue towards the immerging new concept electronic devices.

关 键 词：Ferroelectric films Polar topologies Piezoresponse force microscopy 

分 类 号：TB34[一般工业技术—材料科学与工程]