Topological superconductors (TSCs), with the capability to host Majorana bound states that can lead to non-Abelian statistics and application in quantum computation, have been one of the most intensively studied topics in condensed matter physics recently. To date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator Cu_xBi₂Se₃ and iron-based superconductor FeTe_0.55Se_0.45. Here, by carrying out synchrotron- and laser-based angle-resolved photoemission spectroscopy, we systematically investigated the electronic structure of a quasi-one-dimensional superconductor TaSe₃ and identified the non-trivial topological surface states. In addition, our scanning tunneling microscopy study revealed a clean cleaved surface with a persistent superconducting gap, proving it suitable for further investigation of potential Majorana modes. These results prove TaSe₃ as a stoichiometric TSC candidate that is stable and exfoliable and therefore a promising platform for the study of rich novel phenomena and application potentials.

拓扑超导体（TSC）具有承载马里亚纳邦的能导致非阿贝尔统计和量子计算应用的束缚态的能力，最近已成为凝聚态物理研究最深入的主题之一。迄今为止，仅提出了几种化合物作为本征TSC的候选化合物，例如掺杂的拓扑绝缘体Cu _x Bi ₂ Se ₃和铁基超导体FeTe _0.55 Se _0.45。在这里，通过基于同步加速器和基于激光的角度分辨光发射光谱，我们系统地研究了准一维超导体TaSe ₃的电子结构。并确定了非平凡的拓扑表面状态。此外，我们的扫描隧道显微镜研究显示了一个干净的分裂表面，并带有持久的超导间隙，证明它适合于进一步研究潜在的马里亚纳模式。这些结果证明TaSe ₃是稳定的和可剥脱的化学计量TSC候选物，因此是研究丰富的新颖现象和应用潜力的有前途的平台。