All-2D CVD-grown semiconductor field-effect transistors with van der Waals graphene contacts
Journal article, 2024

Two-dimensional (2D) semiconductors and van der Waals (vdW) heterostructures with graphene have generated enormous interest for future electronic, optoelectronic, and energy-harvesting applications. The electronic transport properties and correlations of such hybrid devices strongly depend on the quality of the materials via chemical vapor deposition (CVD) process, their interfaces and contact properties. However, detailed electronic transport and correlation properties of the 2D semiconductor field-effect transistor (FET) with vdW graphene contacts for understanding mobility limiting factors and metal-insulator transition properties are not explored. Here, we investigate electronic transport in scalable all-2D CVD-grown molybdenum disulfide (MoS2) FET with graphene contacts. The Fermi level of graphene can be readily tuned by a gate voltage to enable a nearly perfect band alignment and, hence, a reduced and tunable Schottky barrier at the contact with good field-effect channel mobility. Detailed temperature-dependent transport measurements show dominant phonon/impurity scattering as a mobility limiting mechanisms and a gate-and bias-induced metal-insulator transition in different temperature ranges, which is explained in light of the variable-range hopping transport. These studies in such scalable all-2D semiconductor heterostructure FETs will be useful for future electronic and optoelectronic devices for a broad range of applications.

Author

Anamul Md Hoque

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Antony George

Friedrich Schiller University Jena

Vasudev Ramachandra

Chalmers, Microtechnology and Nanoscience (MC2)

Emad Najafidehaghani

Friedrich Schiller University Jena

Ziyang Gan

Friedrich Schiller University Jena

Richa Mitra

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Bing Zhao

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

S. Sahoo

Institute of Physics Bhubaneswar

Homi Bhabha National Institute (HBNI)

Maria Abrahamsson

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry

Qiuhua Liang

Chalmers, Physics, Condensed Matter and Materials Theory

Julia Wiktor

Chalmers, Physics, Condensed Matter and Materials Theory

Andrey Turchanin

Friedrich Schiller University Jena

Sergey Kubatkin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Samuel Lara Avila

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Saroj Prasad Dash

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

npj 2D Materials and Applications

23977132 (eISSN)

Vol. 8 1 55

2Dimensional van der Waals Spin-Orbit Torque Technology

Swedish Research Council (VR) (2021-05925), 2021-12-01 -- 2024-11-30.

2D material-based technology for industrial applications (2D-TECH)

VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.

GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.

Spintronics with Topological Quantum Material and Magnetic Heterostructures

Swedish Research Council (VR) (2021-04821), 2022-01-01 -- 2025-12-31.

2D Heterostructure Non-volatile Spin Memory Technology (2DSPIN-TECH)

European Commission (EC) (EC/HE/101135853), 2023-12-01 -- 2026-11-30.

Topology and Magnetism in Novel Quantum Materials

Swedish Research Council (VR) (2018-07046), 2020-01-01 -- 2021-12-31.

Graphene Core Project 3 (Graphene Flagship)

European Commission (EC) (EC/H2020/881603), 2020-04-01 -- 2023-03-31.

Spintronics with Topological Quantum Material and Magnetic Heterostructures

Swedish Research Council (VR) (2021-04821), 2022-01-01 -- 2025-12-31.

Subject Categories

Condensed Matter Physics

DOI

10.1038/s41699-024-00489-2

More information

Latest update

10/18/2024