Band splitting and Weyl nodes in trigonal tellurium studied by angle-resolved photoemission spectroscopy and density functional theory

Abstract

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.

6 pages, 3 figures

References in corpus (4)

• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Weyl Node and Spin Texture in Trigonal Tellurium and Selenium
• Unexpected Dirac-Node Arc in the Topological Line-Node Semimetal HfSiS
• Current-induced Orbital and Spin Magnetizations in Crystals with Helical Structure

Cited by in corpus (6)

• Thermoelectric Performance of 2D Tellurium with Accumulation Contacts
• Strong electrical magneto-chiral anisotropy in tellurium
• Large Second-Harmonic Generation and Linear Electro-Optic Effect in Trigonal Selenium and Tellurium
• Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order
• Magneto-transport properties of tellurium under extreme conditions
• Growth and Strain Engineering of Trigonal Te for Topological Quantum Phases in Non-Symmorphic Chiral Crystals