Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological properties. Here, using symmetry analysis and first-principles calculations, we propose the coexistence of multiple topological nodal structure in LaSb2, including topological nodal surfaces, nodal lines and in particular eightfold degenerate nodal points, which have been scarcely observed in a single material. Further, utilizing high resolution angle-resolved photoemission spectroscopy in combination with Shubnikov-de Haas quantum oscillations measurements, we confirm the existence of nodal surfaces and eightfold degenerate nodal points in LaSb2, and extract the {\pi} Berry phase proving the non-trivial electronic band structure topology therein. The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear magnetoresistance. Our work renews the insights into the exotic topological phenomena in LaSb2 and its analogous.
@article{arxiv.2208.10437,
title = {Multiple topological nodal structure in LaSb2 with large linear magnetoresistance},
author = {Y. X. Qiao and Z. C. Tao and F. Y. Wang and Huaiqiang Wang and Z. C. Jiang and Z. T. Liu and Soohyun Cho and F. Y. Zhang and Q. K. Meng and W. Xia and Y. C. Yang and Z. Huang and J. S. Liu and Z. H. Liu and Z. W. Zhu and S. Qiao and Y. F. Guo and Haijun Zhang and Dawei Shen},
journal= {arXiv preprint arXiv:2208.10437},
year = {2022}
}