Gate-controlled multistate modulation in few-layer graphene via layer-by-layer ion intercalation  

作　　者：Siyi Zhou Shaorui Li Yongchao Wang Chenglin Yu Yayu Wang Jinsong Zhang 

机构地区：[1]State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing,100084,China [2]Frontier Science Center for Quantum Information,Beijing,100084,China [3]Hefei National Laboratory,Hefei,230088,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第4期1-8,共8页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12274252,and 12350404);the Basic Science Center Project of NSFC(Grant No.52388201);the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302502)。

摘　　要：The simultaneous modulation of electric and optical properties in graphene is essential for advancing high-performance applications in optoelectronics.However,achieving in-situ control of multiple electric and optical states in graphene devices remains a challenge.Here we demonstrate a versatile and reversible electric-field control of organic-ion intercalation from bilayer to pentalayer graphene.Through simultaneous optical imaging and electric measurements,we reveal multiple physical states controlled by the layer-by-layer intercalation processes,resulting in both high transparency and high electric conductance with an increase in the number of intercalated layers.Raman spectroscopy demonstrates that the intercalated graphene maintains a high carrier concentration without lattice degradation.Moreover,Hall effect measurements reveal that the carrier density can reach approximately 1.5×10^(14)cm^(-2)per layer.The ability to synchronously control the transparency and conductance states by adjusting the number of ion-intercalated layers highlights the potential of multistate modulation for the development of advanced optoelectronic devices in two-dimensional materials.

关 键 词：GRAPHENE gate control ion intercalation multistate modulation 

分 类 号：TQ127.11[化学工程—无机化工]