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Title: Room-temperature ferroelectricity in CuInP2S6 ultrathin flakes
Authors: Liu, Fucai
You, Lu
Seyler, Kyle L.
Li, Xiaobao
Yu, Peng
Lin, Junhao
Wang, Xuewen
Zhou, Jiadong
Wang, Hong
He, Haiyong
Pantelides, Sokrates T.
Zhou, Wu
Sharma, Pradeep
Xu, Xiaodong
Ajayan, Pulickel M.
Wang, Junling
Liu, Zheng
Keywords: Ferroelectrics And Multiferroics
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Issue Date: 2016
Source: Liu, F., You, L., Seyler, K. L., Li, X., Yu, P., Lin, J., et al. (2016). Room-temperature ferroelectricity in CuInP2S6 ultrathin flakes. Nature Communications, 7, 12357-.
Series/Report no.: Nature Communications
Abstract: Two-dimensional (2D) materials have emerged as promising candidates for various optoelectronic applications based on their diverse electronic properties, ranging from insulating to superconducting. However, cooperative phenomena such as ferroelectricity in the 2D limit have not been well explored. Here, we report room-temperature ferroelectricity in 2D CuInP2S6 (CIPS) with a transition temperature of ∼320 K. Switchable polarization is observed in thin CIPS of ∼4 nm. To demonstrate the potential of this 2D ferroelectric material, we prepare a van der Waals (vdW) ferroelectric diode formed by CIPS/Si heterostructure, which shows good memory behaviour with on/off ratio of ∼100. The addition of ferroelectricity to the 2D family opens up possibilities for numerous novel applications, including sensors, actuators, non-volatile memory devices, and various vdW heterostructures based on 2D ferroelectricity.
DOI: 10.1038/ncomms12357
Schools: School of Electrical and Electronic Engineering 
School of Materials Science & Engineering 
Research Centres: Centre for Programmable Materials 
Nanoelectronics Centre of Excellence 
Rights: © 2016 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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