Ultrahigh-temperature ferromagnetism in MoS_(2) Moirésuperlattice/graphene hybrid heterostructures  

作　　者：Liang Cai Hengli Duan Qinghua Liu Chao Wang Hao Tan Wei Hu Fengchun Hu Zhihu Sun Wensheng Yan 

机构地区：[1]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei,230029,China

出　　处：《Nano Research》2021年第11期4182-4187,共6页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.11975234,11775225,12075243,and 12005227);Users with Excellence Program of Hefei Science Center CAS(Nos.2019HSC-UE002,2020HSC-UE002,and 2020HSC-CIP013);Postdoctoral Science Foundation of China(Nos.2020TQ0316,2020M682041,and 2019M662202);The authors would like to thank BSRF,SSRF and NSRL for the synchrotron beamtime.This work was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.

摘　　要：Realizing high-temperature ferromagnetism in two-dimensional(2D)semiconductor nanosheets is significant for their applications in next-generation magnetic and electronic nanodevices.Herein,this goal could be achieved on a MoS_(2) Moirésuperlattice grown on the reduced graphene oxide(RGO)substrate by a hydrothermal approach.The as-synthesized bilayer MoS_(2) superlattice structure with rotating angle(ϕ=13°±1°)of two hexagonal MoS_(2) lattices,possesses outstanding ferromagnetic property and an ultra-high Curie temperature of 990 K.The X-ray absorption near-edge structure and ultraviolet photoelectron spectroscopies combined with density functional theory calculation indicate that the covalent interactions between MoS_(2) Moirésuperlattice and RGO substrate lead to the formation of interfacial Mo-S-C bonds and complete spin polarization of Mo 4d electrons near the Fermi level.This design could be generalized and may open up a possibility for tailoring the magnetism of other 2D materials.

关 键 词：MoS2 moirésuperlattice high-temperature ferromagnetism XAFS hybrid heterostructures 2D nanosheets 

分 类 号：TB30[一般工业技术—材料科学与工程]