非中心对称超导体BiPd拓扑表面态的发现
Discovery of the topological surface state in a noncentrosymmetric superconductor BiPd
摘要：
近年来，非中心对称超导体BiPd由于具有拓扑超导体的可能性而引起了人们的广泛研究兴趣。在这里，我们报告了一个系统的高分辨率角分辨光电子能谱（ARPES）的正常状态下的电子性质的BiPd的研究。我们的实验结果表明，在较高的结合能与狄拉克点的位置在费米能级以下约700 meV的表面态的存在。详细的光子能量和温度依赖的测量补充我们的第一性原理计算提供了进一步的证据，拓扑表面态的存在下，在高结合能。费米能级附近拓扑表面态的缺乏否定了这种材料表面拓扑超导行为的可能性。我们的第一个直接实验发现的拓扑表面状态的BiPd提供了新的信息，将指导未来的搜索拓扑超导性的非中心对称材料。
英文摘要：
Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of being a topological superconductor. Here, we report a systematic high-resolution angle resolved photoemission spectroscopy (ARPES) study of the normal state electronic properties of BiPd. Our experimental results show the presence of a surface state at higher binding energy with the location of Dirac point at around 700 meV below the Fermi level. The detailed photon energy and temperature dependent measurements complemented by our first-principles calculations provide further evidence for the presence of the topological surface state at high binding energy. The absence of topological surface states near the Fermi level negates the possibility of the topological superconducting behavior in the surface of this material. Our first direct experimental discovery of a topological surface state in BiPd provides novel information that will guide the future search for topological superconductivity in noncentrosymmetric materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
