Ultrahigh-temperature ferromagnetism in MoS2 Moiré superlattice/graphene hybrid heterostructures

Liang Cai*, Hengli Duan, Qinghua Liu, Chao Wang, Hao Tan, Wei Hu, Fengchun Hu, Zhihu Sun*, Wensheng Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

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 MoS2 Moiré superlattice grown on the reduced graphene oxide (RGO) substrate by a hydrothermal approach. The as-synthesized bilayer MoS2 superlattice structure with rotating angle (ϕ = 13° ± 1°) of two hexagonal MoS2 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 MoS2 Moiré superlattice 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. [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)4182-4187
Number of pages6
JournalNano Research
Volume14
Issue number11
DOIs
StatePublished - Nov 2021

Bibliographical note

Funding Information:
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), and 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.

Publisher Copyright:
© 2021, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

  • 2D nanosheets
  • high-temperature ferromagnetism
  • hybrid heterostructures
  • MoS moiré superlattice
  • XAFS

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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