Dey, A, Yan, W, Balakrishnan, N ORCID: https://orcid.org/0000-0002-7236-5477, Xie, S, Kudrynskyi, Z, Makarovsky, O, Yan, F, Wang, K and Patane, A (2022) Memristive effects due to charge transfer in graphene gated through ferroelectric CuInP2S6. 2D Materials, 9 (3).

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Dey+et+al_2022_2D_Mater._10.1088_2053-1583_ac6191.pdf - Accepted Version
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Abstract

Ferroelectricity at the nanometre scale can drive the miniaturisation and wide application of ferroelectric devices for memory and sensing applications. The two-dimensional van der Waals (2D-vdWs) ferroelectrics CuInP2S6 (CIPS) has attracted much attention due to its robust ferroelectricity found in thin layers at room temperature. Also, unlike many 2D ferroelectrics, CIPS is a wide band gap semiconductor, well suited for use as a gate in field-effect transistors (FETs). Here, we report on a hybrid FET in which the graphene conducting channel is gated through a CIPS layer. We reveal hysteresis effects in the transfer characteristics of the FET, which are sensitive to the gate voltage, temperature and light illumination. We demonstrate charge transfer at the CIPS/graphene interface in the dark and under light illumination. In particular, light induces a photodoping effect in graphene that varies from n- to p-type with increasing temperature. These hybrid FETs open up opportunities for electrically and optically controlled memristive devices.

Item Type: Article
Additional Information: As the Version of Record of this article is going to be/has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period. Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permission may be required. All third party content is fully copyright protected, unless specifically stated otherwise in the figure caption of the Version of Record.
Uncontrolled Keywords: van der Waals Ferroelectrics; two-dimensional materials; electrical transport; CuInP2S6; graphene
Subjects: Q Science > Q Science (General)
Depositing User: Symplectic
Date Deposited: 05 Apr 2022 10:15
Last Modified: 07 Jun 2022 13:58
URI: https://eprints.keele.ac.uk/id/eprint/10792

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