Engineering covalently bonded 2D layered materials by self-intercalation

Zhao，Xiaoxu1,2; Song，Peng2; Wang，Chengcai3; Riis-Jensen，Anders C.4; Fu，Wei2; Deng，Ya5; Wan，Dongyang6; Kang，Lixing5; Ning，Shoucong1; Dan，Jiadong1; Venkatesan，T.1,6; Liu，Zheng5; Zhou，Wu7; Thygesen，Kristian S.4; Luo，Xin8; Pennycook，Stephen J.1; Loh，Kian Ping2

2020-05-14

10.1038/s41586-020-2241-9

NATURE   影响因子和分区

0028-0836

1476-4687

Two-dimensional (2D) materials offer a unique platform from which to explore the physics of topology and many-body phenomena. New properties can be generated by filling the van der Waals gap of 2D materials with intercalants; however, post-growth intercalation has usually been limited to alkali metals. Here we show that the self-intercalation of native atoms into bilayer transition metal dichalcogenides during growth generates a class of ultrathin, covalently bonded materials, which we name ic-2D. The stoichiometry of these materials is defined by periodic occupancy patterns of the octahedral vacancy sites in the van der Waals gap, and their properties can be tuned by varying the coverage and the spatial arrangement of the filled sites. By performing growth under high metal chemical potential we can access a range of tantalum-intercalated TaS(Se), including 25% Ta-intercalated TaS, 33.3% Ta-intercalated TaS, 50% Ta-intercalated TaS, 66.7% Ta-intercalated TaSe (which forms a Kagome lattice) and 100% Ta-intercalated TaSe. Ferromagnetic order was detected in some of these intercalated phases. We also demonstrate that self-intercalated VS, InSe and FeTe can be grown under metal-rich conditions. Our work establishes self-intercalation as an approach through which to grow a new class of 2D materials with stoichiometry- or composition-dependent properties.

SCI

英语

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其他

A*STAR Project 'Scalable Growth of Ultrathin Ferroelectric Materials for Memory Technologies'[A1983c0035] ; National Key R&D Program of China[2018YFA0305800] ; Natural Science Foundation of China[51622211] ; Ministry of Education (MOE)[MOE2017-T2-2-139] ; MOE[2017-T2-2-136][2018-T3-1-002] ; National Natural Science Foundation of China[11804286] ; Fundamental Research Funds for the Central Universities[19lgpy263] ; European Research Council under the European Union's Horizon 2020 research and innovation programme[773122] ; Danish National Research Foundation[DNRF103]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000532836000027

NATURE PUBLISHING GROUP

BIOLOGY & BIOCHEMISTRY;CLINICAL MEDICINE;MULTIDISCIPLINARY;PLANT & ANIMAL SCIENCE;ENVIRONMENT/ECOLOGY;SOCIAL SCIENCES, GENERAL;MICROBIOLOGY;ECONOMICS BUSINESS;IMMUNOLOGY;MATERIALS SCIENCE;COMPUTER SCIENCE;SPACE SCIENCE;MOLECULAR BIOLOGY & GENETICS;CHEMISTRY;NEUROSCIENCE & BEHAVIOR;PHYSICS;GEOSCIENCES;ENGINEERING

2-s2.0-85084627805

Scopus

1.Department of Materials Science and Engineering,National University of Singapore,Singapore,Singapore
2.Department of Chemistry and Centre for Advanced 2D Materials,National University of Singapore,Singapore,Singapore
3.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,China
4.CAMD and Center for Nanostructured Graphene (CNG),Department of Physics,Technical University of Denmark,Kongens Lyngby,Denmark
5.School of Materials Science and Engineering,Nanyang Technological University,Singapore,Singapore
6.NUSNNI-NanoCore,National University of Singapore,Singapore,Singapore
7.School of Physical Sciences and CAS Centre for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing,China
8.State Key Laboratory of Optoelectronic Materials and Technologies,Centre for Physical Mechanics and Biophysics,Sun Yat-sen University,Guangzhou,China

Zhao，Xiaoxu,Song，Peng,Wang，Chengcai,et al. Engineering covalently bonded 2D layered materials by self-intercalation[J]. NATURE,2020,581(7807):171-177.

Zhao，Xiaoxu.,Song，Peng.,Wang，Chengcai.,Riis-Jensen，Anders C..,Fu，Wei.,...&Loh，Kian Ping.(2020).Engineering covalently bonded 2D layered materials by self-intercalation.NATURE,581(7807),171-177.

Zhao，Xiaoxu,et al."Engineering covalently bonded 2D layered materials by self-intercalation".NATURE 581.7807(2020):171-177.