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Computational understanding of electronic properties of graphene/\({\mathrm{{PtS}}_2}\) heterostructure under electric field

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Abstract

Graphene-based two-dimensional van der Waals heterostructures (vdWH) have recently shown a great potential for high-performance nanodevices. Here, we design a novel vdWH, consisting of the graphene and a noble transition metal dichalcogenide \({\mathrm{{PtS}}_2}\) monolayer and investigate its electronic properties as well as the effect of electric field. We find that the key intrinsic characteristics of both the graphene and \({\mathrm{{PtS}}_2}\) monolayers are well preserved due to the weak vdW interactions. The graphene is found to form an n-type Schottky contact with the \({\mathrm{{PtS}}_2}\) monolayer with a small barrier height of 0.11 eV. Moreover, this small barrier height of the \(\mathrm{{G}}/{\mathrm{{PtS}}_2}\) vdWH is known to be very sensitive to the external electric field. It can be controlled and turned to the Ohmic contact under electric field. These findings could provide significant knowledge for designing novel electronic and optoelectronic devices of such heterostructure.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Le Quy Don Technical University, Hanoi, Viet Nam

    Chuong V. Nguyen

  2. NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam

    Huong T. T. Phung

  3. Laboratory of Applied Physics, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam

    Khang D. Pham

  4. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam

    Khang D. Pham

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  1. Chuong V. Nguyen
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  2. Huong T. T. Phung
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  3. Khang D. Pham
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Correspondence to Khang D. Pham.

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Nguyen, C.V., Phung, H.T.T. & Pham, K.D. Computational understanding of electronic properties of graphene/\({\mathrm{{PtS}}_2}\) heterostructure under electric field. Appl. Phys. A 125, 536 (2019). https://doi.org/10.1007/s00339-019-2845-9

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