Unveiling charge transport in monolayer and few-layer CoPS3/metal contact: Insight from C-AFM
Mouhui Yan,
Haotian Wang,
Wenqi Wei,
Tianxiang Zhu,
Guanghui Cao,
Jianxin Zhong,
Wei Ren
Affiliations
Mouhui Yan
State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, International Center of Quantum and Molecular Structures, Institute for Quantum Science and Technology, Shanghai Key Laboratory of High Temperature Superconductors, Department of Physics, Shanghai University, 200444 Shanghai, People’s Republic of China
Haotian Wang
State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, International Center of Quantum and Molecular Structures, Institute for Quantum Science and Technology, Shanghai Key Laboratory of High Temperature Superconductors, Department of Physics, Shanghai University, 200444 Shanghai, People’s Republic of China
Wenqi Wei
Center for Semiconductor Heterogeneous Materials and Devices, SongShan Lake Materials Laboratory, 523830 Dongguan, People’s Republic of China
Tianxiang Zhu
Changzhou Institute of Technology, 213032 Changzhou, People’s Republic of China
Guanghui Cao
State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, International Center of Quantum and Molecular Structures, Institute for Quantum Science and Technology, Shanghai Key Laboratory of High Temperature Superconductors, Department of Physics, Shanghai University, 200444 Shanghai, People’s Republic of China
Jianxin Zhong
State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, International Center of Quantum and Molecular Structures, Institute for Quantum Science and Technology, Shanghai Key Laboratory of High Temperature Superconductors, Department of Physics, Shanghai University, 200444 Shanghai, People’s Republic of China
Wei Ren
State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, International Center of Quantum and Molecular Structures, Institute for Quantum Science and Technology, Shanghai Key Laboratory of High Temperature Superconductors, Department of Physics, Shanghai University, 200444 Shanghai, People’s Republic of China
Monolayer and few-layer CoPS3 have been successfully synthesized via an Au-assisted exfoliation technique, with their transport properties subsequently investigated by conductive atomic force microscopy. Rectification effects can be observed in CoPS3 nanosheets due to the Schottky junction formation at the Au/CoPS3 interface, especially in configurations comprising two or more layer flakes. The distinct transport properties between monolayer and few-layer samples demonstrate that the charge transport behavior in the vertical direction is associated with the van der Waals gap. The calculated electron affinity for CoPS3 is about 4.84 eV, as revealed by the thermionic emission model. The results obtained contribute to the knowledge base concerning the transport characteristics of ultrathin MPX3, facilitating further exploration of the transport behavior of these materials and their potential applications in novel electronic devices.
