Topological electronic structure and Weyl points in nonsymmorphic hexagonal materials
From MaRDI portal
Publication:6340183
arXiv2005.02959MaRDI QIDQ6340183
Author name not available (Why is that?)
Publication date: 6 May 2020
Abstract: Using topological band theory analysis we show that the nonsymmorphic symmetry operations in hexagonal lattices enforce Weyl points at the screw-invariant high-symmetry lines of the band structure. The corepresentation theory and connectivity group theory show that Weyl points are generated by band crossings in accordion-like and hourglass-like dispersion relations. These Weyl points are stable against weak perturbations and are protected by the screw rotation symmetry. Based on first-principles calculations we found a complete agreement between the topological predicted energy dispersion relations and real hexagonal materials. Topological charge (chirality) and Berry curvature calculations show the simultaneous formation of Weyl points and nodal-lines in 4d transition-metal trifluorides such as AgF3 and AuF3. Furthermore, a large intrinsic spin-Hall conductivity was found due to the combined strong spin-orbit coupling and multiple Weyl-point crossings in the electronic structure. These materials could be used to the spin/charge conversion in more energy-efficient spintronic devices.
This page was built for publication: Topological electronic structure and Weyl points in nonsymmorphic hexagonal materials
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q6340183)
