Ferroelectric Schottky diodes of CuInP2S6 nanosheet
Abstract
Ferroelectricity in van der Waals (vdW) layered material has attracted a great deal of interest recently. CuInP2S6 (CIPS), the only vdW layered material whose ferroelectricity in the bulk was demonstrated by direct polarization measurements, was shown to remain ferroelectric down to a thickness of a few nanometers. However, its ferroelectric properties have just started to be explored in the context of potential device applications. We report here the preparation and measurements of metal-ferroelectric semiconductor-metal heterostructures using nanosheets of CIPS obtained by mechanical exfoliation. Four bias voltage and polarization dependent resistive states were observed in the current-voltage characteristics, which we attribute to the formation of ferroelectric Schottky diode, along with switching behavior.
- Publication:
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Applied Physics Letters
- Pub Date:
- October 2023
- DOI:
- 10.1063/5.0160928
- arXiv:
- arXiv:2309.10045
- Bibcode:
- 2023ApPhL.123n2903Y
- Keywords:
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- Condensed Matter - Materials Science
- E-Print:
- 19 pages, 8 figures