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arXiv · 2307.08437

Synthesis of single-crystalline LuN films

Guanhua Su·Shuling Xiang·Jiachang Bi·Fugang Qi·Peiyi Li·Shunda Zhang·Shaozhu Xiao·Ruyi Zhang·Zhiyang Wei·Yanwei Cao
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Abstract

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 $\sim$ 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.

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Guanhua Su, Shuling Xiang, Jiachang Bi, Fugang Qi, Peiyi Li, Shunda Zhang, Shaozhu Xiao, Ruyi Zhang, Zhiyang Wei, Yanwei Cao. 2023-07-17. Synthesis of single-crystalline LuN films. https://arxiv.org/abs/2307.08437

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