Seeded 2D epitaxy of large-area single-crystal films of the van der Waals semiconductor 2H MoTe <sub>2</sub>
Xiaolong Xu, Yu Pan, Shuai Liu, Bo Han, Pingfan Gu, Siheng Li, Wanjin Xu, Yuxuan Peng, Zheng Han, Ji Chen, Peng Gao, Yu Ye
Abstract
Seeding 2D crystals Small, single crystals are often used to direct the growth of larger, bulk single crystals. Xu et al. modified these methods to grow single-crystal films of a two-dimensional (2D) semiconductor, 2H molybdenum ditelluride (2H MoTe 2 ), on an amorphous glass surface. After coating the wafer with a 1T′ MoTe 2 film, a small 2H MoTe 2 crystallite was placed on the wafer. The wafer was capped with an alumina film, except for a small hole above the seed region that allowed entry of additional tellurium during the heating process that drove the phase transition and epitaxial growth of 2H MoTe 2 . Science , this issue p. 195