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

doi:10.1007/s12274-021-3360-9

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

KAUST Solar Center

Research output: Contribution to journal › Article › peer-review

8 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 language	English (US)
Pages (from-to)	4182-4187
Number of pages	6
Journal	Nano Research
Volume	14
Issue number	11
DOIs	https://doi.org/10.1007/s12274-021-3360-9
State	Published - 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

Access to Document

10.1007/s12274-021-3360-9

Cite this

@article{dd91056db76d4ab7be6a6b8bedd3da1c,

title = "Ultrahigh-temperature ferromagnetism in MoS2 Moir{\'e} superlattice/graphene hybrid heterostructures",

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 Moir{\'e} 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 Moir{\'e} 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.]",

keywords = "2D nanosheets, high-temperature ferromagnetism, hybrid heterostructures, MoS moir{\'e} superlattice, XAFS",

author = "Liang Cai and Hengli Duan and Qinghua Liu and Chao Wang and Hao Tan and Wei Hu and Fengchun Hu and Zhihu Sun and Wensheng Yan",

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: {\textcopyright} 2021, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

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AU - Cai, Liang

AU - Duan, Hengli

AU - Liu, Qinghua

AU - Wang, Chao

AU - Tan, Hao

AU - Hu, Wei

AU - Hu, Fengchun

AU - Sun, Zhihu

AU - Yan, Wensheng

N1 - 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.

PY - 2021/11

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N2 - 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.]

AB - 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.]

KW - 2D nanosheets

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