In the nitrogen-doped lutetium hydride (Lu-H-N) system, the presence of Lu-N chemical bonds plays a key role in the emergence of possible room-temperature superconductivity at near ambient pressure. However, due to the synthesis of single-crystalline LuN being a big challenge, the understanding of LuN is insufficient thus far. Here, we report on the epitaxial growth of single-crystalline LuN films. The crystal structures of LuN films were characterized by high-resolution X-ray diffraction. The measurement of low-temperature electrical transport indicates the LuN film is semiconducting from 300 to 2 K, yielding an activation gap of ∼ 0.02 eV. Interestingly, negative magnetoresistances can be observed below 12 K, which can result from the defects and magnetic impurities in LuN films. Our results uncover the electronic and magnetic properties of single-crystalline LuN films.
@article{arxiv.2307.08437,
title = {Synthesis of single-crystalline LuN films},
author = {Guanhua Su and Shuling Xiang and Jiachang Bi and Fugang Qi and Peiyi Li and Shunda Zhang and Shaozhu Xiao and Ruyi Zhang and Zhiyang Wei and Yanwei Cao},
journal= {arXiv preprint arXiv:2307.08437},
year = {2023}
}