【作者】
王欣伟；
肖承诚；
杨超；
陈苗根；
杨声远；
胡军；
任召辉；
潘辉；
朱文光；
许祝安；
陆赟豪；
【Author】
Xinwei Wang;Chengcheng Xiao;Chao Yang;Miaogen Chen;Shengyuan A.Yang;Jun Hu;Zhaohui Ren;Hui Pan;Wenguang Zhu;Zhu-An Xu;Yunhao Lu;State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University;Departments of Materials and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London;Department of Physics, China Jiliang University;Research Laboratory for Quantum Materials, Singapore University of Technology and Design;School of Physical Science and Technology, Soochow University;Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau;ICQD, Hefei National Laboratory for Physical Science at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, Department of Physics, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China;Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University;Collaborative Innovation Centre of Advanced Microstructures, Nanjing University;
【通讯作者】
胡军;朱文光;陆赟豪;
【机构】
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University；
Departments of Materials and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London；
Department of Physics, China Jiliang University；
Research Laboratory for Quantum Materials, Singapore University of Technology and Design；
School of Physical Science and Technology, Soochow University；
Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau；
ICQD, Hefei National Laboratory for Physical Science at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, Department of Physics, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China；
Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University；
Collaborative Innovation Centre of Advanced Microstructures, Nanjing University；
【摘要】 基于磁电效应,通过电场调控材料的磁性能有利于低能耗、高密度存储设备的应用和发展.以前的相关研究大多为通过压电效应或外加电场进行材料磁性的易失性调控,即材料的磁性改变无法在撤掉电场后维持.虽然可以产生自发极化且能在外电场作用下改变极化方向的铁电材料为非易失调控提供了优异的平台,但随着材料尺度的减小,其自发极化逐渐减小甚至消失,很难在原子尺度实现电控磁性.二维铁电材料在实验上的成功制备,为实现原子尺度下的非易失调控提供了新的机遇.本文基于第一性原理提出了一种通过二维铁电基底调节分子磁性的方法.研究发现,不仅磁矩大小可以在零或非零之间转换,其易轴也可以在面内或面外之间反转,同时较大的磁各向异性能使其有望实现在室温以上的应用.该结果为二维铁电调控材料磁性的研究提供了新思路.更多还原
【Abstract】 The electric control of magnetic properties based on magnetoelectric effect is crucial for the development of future data storage devices.Here,based on first-principles calculations,a strong magnetoelectric effect is proposed to effectively switch on/off the magnetic states as well as alter the in-plane/perpendicular easy axes of metal-phthalocyanine molecules（MPc）by reversing the electric polarization of the underlying two-dimensional（2D）ferroelectric a-In2Se3 substrate with the application of an external electric field.The mechanism originates from the different hybridization between the molecule and the ferroelectric substrate in which the different electronic states of surface Se layer play a dominant role.Moreover,the magnetic moments and magnetic anisotropy energies（MAE）of OsPc/In2Se3 can be further largely enhanced by a functionalized atom atop the OsPc molecule.The I-OsPc/In2Se3 system possesses large MAE up to 30 meV at both polarization directions,which is sufficient for room-temperature applications.These findings provide a feasible scheme to realize ferroelectric control of magnetic states in 2D limit,which have great potential for applications in nanoscale electronics and spintronics.更多还原
【基金】 supported by the National Natural Science Foundation of China (11974307, 61574123, 11674299, and 11634011);National Key Research and Development Program of China (2017YFA0204904);Fundamental Research Funds for the Central Universities (2019FZA3004, WK2340000082, and WK2060190084);Zhejiang Provincial Natural Science Foundation (D19A040001);Anhui Initiative in Quantum Information Technologies (AHY170000);Strategic Priority Research Program of Chinese Academy of Sciences (XDB30000000)
