角分辨光电子能谱和密度泛函理论研究碲的能带分裂和Weyl结
Band splitting and Weyl nodes in trigonal tellurium studied by angle-resolved photoemission spectroscopy and density functional theory
摘要：
我们已经进行了高分辨率角分辨光电子能谱（ARPES）的三角碲组成的螺旋链的晶体。通过三维布里渊区的能带结构映射，我们发现了晶体的手征性质导致能带分裂的明确证据。直接比较的带色散的ARPES结果和第一性原理的带结构计算表明，外尔节点和微小的自旋极化空穴袋周围的H点的存在。这一结果为研究手性晶体的对称性、能带结构和奇异物理性质之间的相互作用开辟了一条途径。
英文摘要：
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on trigonal tellurium consisting of helical chains in the crystal. Through the band-structure mapping in the three-dimensional Brillouin zone, we found a definitive evidence for the band splitting originating from the chiral nature of crystal. A direct comparison of the band dispersion between the ARPES results and the first-principles band-structure calculations suggests the presence of Weyl nodes and tiny spin-polarized hole pockets around the H point. The present result opens a pathway toward studying the interplay among crystal symmetry, band structure, and exotic physical properties in chiral crystals.
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。
