van der Waals (vdW) dielectric materials with a wide bandgap and high dielectric constant are necessary for the development of 2D electronics. Here, the authors report the synthesis of quasi-vdW layered Sm2O2SO4 thin crystals, showing a bandgap of ~5.54 eV and a dielectric constant ~18, leading to high performance 2D MoS2 transistors.
- Jiashuai Yuan
- Chuanyong Jian
- Wei Liu
