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High-performance van der Waals antiferroelectric CuCrP2S6-based memristors.
- Source :
- Nature Communications; 5/6/2023, p1-11, 11p
- Publication Year :
- 2023
-
Abstract
- Layered thio- and seleno-phosphate ferroelectrics, such as CuInP<subscript>2</subscript>S<subscript>6</subscript>, are promising building blocks for next-generation nonvolatile memory devices. However, because of the low Curie point, the CuInP<subscript>2</subscript>S<subscript>6</subscript>-based memory devices suffer from poor thermal stability (<42 °C). Here, exploiting the electric field-driven phase transition in the rarely studied antiferroelectric CuCrP<subscript>2</subscript>S<subscript>6</subscript> crystals, we develop a nonvolatile memristor showing a sizable resistive-switching ratio of ~ 1000, high switching endurance up to 20,000 cycles, low cycle-to-cycle variation, and robust thermal stability up to 120 °C. The resistive switching is attributed to the ferroelectric polarization-modulated thermal emission accompanied by the Fowler–Nordheim tunneling across the interfaces. First-principles calculations reveal that the good device performances are associated with the exceptionally strong ferroelectric polarization in CuCrP<subscript>2</subscript>S<subscript>6</subscript> crystal. Furthermore, the typical biological synaptic learning rules, such as long-term potentiation/depression and spike amplitude/spike time-dependent plasticity, are also demonstrated. The results highlight the great application potential of van der Waals antiferroelectrics in high-performance synaptic devices for neuromorphic computing.Layered thio- and seleno-phosphate ferroelectrics show promise for next-generation memory but have thermal stability issues. Using the electric field-driven phase transition in antiferroelectric CuCrP2S6, the authors introduce a robust memristor, emphasizing the potential of van der Waals antiferroelectrics in advanced neuromorphic computing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 173955061
- Full Text :
- https://doi.org/10.1038/s41467-023-43628-x