Gate-controlled magnetic transitions in Fe_(3)GeTe_(2)with lithium ion conducting glass substrate  

作　　者：Guangyi Chen Yu Zhang Shaomian Qi Jian-Hao Chen 陈光毅;张玉;齐少勉;陈剑豪(International Center of Quantum Material,School of Physics,Peking University,Beijing 100871,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Key Laboratory for the Physics and Chemistry of Nanodevices,Peking University,Beijing 100871,China;Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing 100871,China)

机构地区：[1]International Center of Quantum Material,School of Physics,Peking University,Beijing 100871,China [2]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [3]Key Laboratory for the Physics and Chemistry of Nanodevices,Peking University,Beijing 100871,China [4]Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing 100871,China

出　　处：《Chinese Physics B》2021年第9期72-76,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant Nos.2019YFA0308402 and 2018YFA0305604);the National Natural Science Foundation of China(Grant Nos.11934001,11774010,and 11921005);Beijing Municipal Natural Science Foundation,China(Grant No.JQ20002).

摘　　要：Since the discovery of magnetism in two dimensions,effective manipulation of magnetism in van der Waals magnets has always been a crucial goal.Ionic gating is a promising method for such manipulation,yet devices gated with conventional ionic liquid may have some restrictions in applications due to the liquid nature of the gate dielectric.Lithium-ion conducting glass-ceramics(LICGC),a solid Li^(+)electrolyte,could be used as a substrate while simultaneously acts as a promising substitute for ionic liquid.Here we demonstrate that the ferromagnetism of Fe_(3)GeTe_(2)2(FGT)could be modulated via LICGC.By applying a voltage between FGT and the back side of LICGC substrate,Li^(+)doping occurs and causes the decrease of the coercive field(Hc)and ferromagnetic transition temperature(Tc)in FGT nanoflakes.A modulation efficiency for H_(c)of up to~24.6%under V_(g)=3.5 V at T=100 K is achieved.Our results provide another method to construct electrically-controlled magnetoelectronics,with potential applications in future information technology.

关 键 词：two-dimensional magnetism two-dimensional material ionic gating 

分 类 号：TB34[一般工业技术—材料科学与工程]