Observation of multiple surface states in naturally cleavable chiral crystal PdSbSe
Zhicheng Jiang, Zhengtai Liu, Chenqiang Hua, Xiangqi Liu, Yichen Yang, Jianyang Ding, Jiayu Liu, Jishan Liu, Mao Ye, Ji Dai, Massimo Tallarida, Yanfeng Guo, Yunhao Lu, and Dawei Shen
Phys. Rev. Materials 9, L031201 (2025) - Published 25 March, 2025
Chiral multifold fermions in topological semimetals host exotic quantum states, but their intuitive spectroscopic studies are often constrained by challenges in achieving high-quality surfaces. In this study, the authors employ high-resolution angle-resolved photoemission spectroscopy (ARPES) in combination with first-principles calculations to uncover multiple chiral Fermi arc surface states in the naturally cleavable topological semimetal PdSbSe. They provide direct spectroscopic evidence of multifold fermions and spin-split bulk bands, firmly establishing PdSbSe as a promising material platform for exploring topological chirality. Furthermore, the identification of high-order Chern numbers and robust surface states provides new insights into chiral electronic structures and paves the way for potential applications in topological quantum devices.
