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説明:

Heterostructures of two-dimensional (2D) materials comprise clean van der Waals (vdW) interfaces that can facilitate charge or energy transfer. Recently, the 2D ferroelectric ­ CuInP2S6 (CIPS) has been integrated with graphene and other 2D materials to realize potentially novel low energy electronic devices. However, the influence of 2D CIPS on the properties of graphene and doping across the vdW interface has not been studied in detail. Here, we study graphene field effect transistors (FETs) with CIPS as the top gate. We find that CIPS leads to modulation of the graphene Fermi level due to local doping. We also find polarization-induced hysteresis in CIPS-gated graphene FETs. Electrical transport measurements from 50 to300 K show that above 200 K, the ferroelectric response decreases. As a result, the hysteresis voltage windows in the graphene ferroelectric FETs (FeFET) transfer curves decrease above 200 K. Our results show that interfacial remote doping affects the macroscopic polarization and performance of CIPS-based graphene FeFETs.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: ferroelectric field effect transistor (FeFET)
, CuInP2S6 (CIPS)
, graphene heterostructures


刊行年月日: 2024-08-21

出版者: Springer Science and Business Media LLC

掲載誌:

• MRS Energy & Sustainability (ISSN: 23292229) vol. 11 issue. 2 p. 616-623

研究助成金:

• European Research Council GA 101019828-2D-LOTTO
• Engineering and Physical Sciences Research Council EP/T026200/1
• Engineering and Physical Sciences Research Council EP/T001038/1
• Japan Society for the Promotion of Science London Grant Numbers 21H05233
• Japan Society for the Promotion of Science London 23H02052
• Japan Society for the Promotion of Science London World Premier International Research Center Initiative (WPI)
• Japan Society for the Promotion of Science London MEXT
• Japan Society for the Promotion of Science London Japan.

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1557/s43581-024-00109-y

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更新時刻: 2026-02-14 22:35:55 +0900

MDRでの公開時刻: 2026-02-10 18:03:06 +0900