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Controlled Growth and Thickness‐Dependent Conduction‐Type Transition of 2D Ferrimagnetic Cr 2 S 3 Semiconductors
Author(s) -
Cui Fangfang,
Zhao Xiaoxu,
Xu Junjie,
Tang Bin,
Shang Qiuyu,
Shi Jianping,
Huan Yahuan,
Liao Jianhui,
Chen Qing,
Hou Yanglong,
Zhang Qing,
Pennycook Stephen J.,
Zhang Yanfeng
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201905896
Subject(s) - materials science , spintronics , ambipolar diffusion , ferrimagnetism , nanotechnology , exfoliation joint , semiconductor , chemical vapor deposition , magnetic semiconductor , substrate (aquarium) , optoelectronics , chemical engineering , magnetization , magnetic field , condensed matter physics , ferromagnetism , graphene , electron , oceanography , physics , quantum mechanics , geology , engineering
2D magnetic materials have attracted intense attention as ideal platforms for constructing multifunctional electronic and spintronic devices. However, most of the reported 2D magnetic materials are mainly achieved by the mechanical exfoliation route. The direct synthesis of such materials is still rarely reported, especially toward thickness‐controlled synthesis down to the 2D limit. Herein, the thickness‐tunable synthesis of nanothick rhombohedral Cr 2 S 3 flakes (from ≈1.9 nm to tens of nanometers) on a chemically inert mica substrate via a facile chemical vapor deposition route is demonstrated. This is accomplished by an accurate control of the feeding rate of the Cr precursor and the growth temperature. Furthermore, it is revealed that the conduction behavior of the nanothick Cr 2 S 3 is variable with increasing thickness (from 2.6 to 4.8 nm and >7 nm) from p‐type to ambipolar and then to n‐type. Hereby, this work can shed light on the scalable synthesis, transport, and magnetic properties explorations of 2D magnetic materials.