Tunable in-plane conductance anisotropy in 2D semiconductive AgCrP <sub>2</sub> S <sub>6</sub> by ion-electron co-modulations
Yujie Sun, Rongjie Zhang, Junyang Tan, Shengfeng Zeng, Shengnan Li, Qiang Wei, Zhiyuan Zhang, Shilong Zhao, Xiaolong Zou, Bilu Liu, Hui–Ming Cheng
Abstract
In-plane anisotropic two-dimensional (2D) semiconductors have gained much interest due to their anisotropic properties, which opens avenues in designing functional electronics. Currently reported in-plane anisotropic semiconductors mainly rely on crystal lattice anisotropy. Herein, AgCrP 2 S 6 (ACPS) is introduced as a promising member to the anisotropic 2D semiconductors, in which, both crystal structure and ion-electron co-modulations are used to achieve tunable in-plane conductance anisotropy. Scanning tunneling electron microscopy and polarized Raman spectroscopy show the structural anisotropy of ACPS. Electrical transport measurements show that its tunable in-plane conductance anisotropy is related to the ion-electron co-modulations, where Ag ion migration is anisotropic along a axis and b axis. Electrical transport measurements show the semiconducting properties of ACPS, as also supported by photoluminescence results. Moreover, the transfer curves of ACPS showcase large V g -related hysteresis, which is directionally controlled by anisotropic Ag ion migration. This work offers a possibility of using anisotropic charge transport in functional electronics by ion-electron co-modulations.