Room-temperature ferroelectricity in CuInP2S6 ultrathin flakes
Nanyang Technological University · University of Washington · +5 more institutions
Abstract
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 CuInP 2 S 6 (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…
Citation impact
- FWCI
- 17.34
- Percentile
- 100%
- References
- 30
Authors
17Topics & keywords
- Ferroelectricity
- Materials science
- Heterojunction
- Optoelectronics
- van der Waals force
- Non-volatile memory
- Polarization (electrochemistry)
- Nanotechnology
- Affordable and clean energy
Funding
- NSNational Science FoundationAward: 1463205
- UDU.S. Department of EnergyAwards: SC0012509, DE-SC0008145, DE-FG02-09ER46554, DE-FG02-, FG02-09ER46554, DE-FG02
- NRNational Research Foundation
- NRNational Research Foundation SingaporeAward: NRF-RF2013-08
- NTNanyang Technological UniversityAward: M4081137.070
- MOMinistry of Education, India
- OOOffice of ScienceAward: DE-FG02-09ER46554
- DODivision of Civil, Mechanical and Manufacturing InnovationAward: 1463205
- BEBasic Energy SciencesAwards: DE-FG02-09ER46554, SC0012509, DE-FG02, DE-SC0008145
- OROak Ridge National Laboratory