Xiaowei Liu, Junjie Shan, Tianjun Cao, Liang Zhu, Jiayu Ma, Gang Wang, Zude Shi, Qishuo Yang, Mingyu Ma, Zenglin Liu, Shengnan Yan, Lizheng Wang, Yudi Dai, Junlin Xiong, Fanqiang Chen, Buwei Wang, Chen Pan, Zhenlin Wang, Bin Cheng, Yongmin He, Xin Luo, Junhao Lin, Shi-Jun Liang, Feng Miao
In situ tailoring of two-dimensional materials' phases under external stimulus facilitates the manipulation of their properties for electronic, quantum and energy applications. However, current methods are mainly limited to the transitions among phases with unchanged chemical stoichiometry. Here we propose on-device phase engineering that allows us to realize various lattice phases with distinct chemical stoichiometries. Using palladium and selenide as a model system, we show that a PdSe2 channel with prepatterned Pd electrodes can be transformed into Pd17 Se15 and Pd4 Se by thermally tailoring the chemical composition ratio of the channel...
April 25, 2024: Nature Materials