Room-temperature ferroelectricity in CuInP2S6 ultrathin flakes
By Fucai Liu, L. You, K. Seyler, Xiaobao Li, Peng Yu, Junhao Lin, Xuewen Wang, Jiadong Zhou, Hong Wang, Haiyong He and 7 more. Nature Communications, 2016
1,070 citations recorded by the source corpus.
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. Two dimensional materials are promising for electronic applications, which await the exploration of cooperative phenomena. Here, Liu et al. report switchable ferroelectric polarization in thin CuInP2S6film at room temperature, demonstrating good memory behaviour with on/off ratio of ∼100 based on two-dimensional ferroelectricity.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/a62175d17db4c519cd5a9b7cb6876c52540c169e
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In Materials Chemistry
Citations in the corpus
- 2D semiconducting materials for electronic and optoelectronic applications: potential and challenge (2020, methodology): “(b) The I–V curves from 30 nm-CIPS/Si diode [135].”
- Two-dimensional materials with piezoelectric and ferroelectric functionalities (2018, methodology): “k The local PFM amplitude (black) and phase (blue) loops during the switching process of the 4 nm CIPS flake ((d–k) reproduced from ref.(13)) Two-dimensional materials with piezoelectric Chaojie Cui et al.”