Sun Yujie, Zhang Rongjie, Tan Junyang, Zeng Shengfeng, Li Shengnan, Wei Qiang, Zhang Zhi-Yuan, Zhao Shilong, Zou Xiaolong, Liu Bilu, Cheng Hui-Ming
Shenzhen Geim Graphene Center, Shenzhen Key Laboratory of Advanced Layered Materials for Value-added Applications, Tsinghua-Berkeley Shenzhen Institute and Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China.
School of Electronic Information Engineering, Foshan University, Foshan 528000, PR China.
Sci Adv. 2025 Jan 10;11(2):eadr3105. doi: 10.1126/sciadv.adr3105. Epub 2025 Jan 8.
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, AgCrPS (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 axis and axis. Electrical transport measurements show the semiconducting properties of ACPS, as also supported by photoluminescence results. Moreover, the transfer curves of ACPS showcase large -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.
面内各向异性二维半导体因其各向异性特性而备受关注，这为功能电子器件的设计开辟了道路。目前报道的面内各向异性半导体主要依赖于晶格各向异性。在此，AgCrPS（ACPS）作为一种有前途的各向异性二维半导体被引入，其中，晶体结构和离子 - 电子共同调制都被用于实现可调节的面内电导各向异性。扫描隧道电子显微镜和偏振拉曼光谱显示了ACPS的结构各向异性。电输运测量表明，其可调节的面内电导各向异性与离子 - 电子共同调制有关，其中Ag离子沿 轴和 轴的迁移是各向异性的。电输运测量显示了ACPS的半导体特性，光致发光结果也支持这一点。此外，ACPS的转移曲线展示出与 相关的大滞后现象，这由各向异性的Ag离子迁移定向控制。这项工作通过离子 - 电子共同调制为在功能电子器件中使用各向异性电荷输运提供了一种可能性。
