Pentagonal SnTe-class nanowires with cationic twin planes are predicted to host two spatially separated helical Dirac modes, one at the core and one at the outer surface.
Band structure of SnTe studied by Photoemission Spectroscopy
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We present an angle-resolved photoemission spectroscopy study of the electronic structure of SnTe, and compare the experimental results to ab initio band structure calculations as well as a simplified tight-binding model of the p-bands. Our study reveals the conjectured complex Fermi surface structure near the L-points showing topological changes in the bands from disconnected pockets, to open tubes, and then to cuboids as the binding energy increases, resolving lingering issues about the electronic structure. The chemical potential at the crystal surface is found to be 0.5eV below the gap, corresponding to a carrier density of p =1.14x10^{21} cm^{-3} or 7.2x10^{-2} holes per unit cell. At a temperature below the cubic-rhombohedral structural transition a small shift in spectral energy of the valance band is found, in agreement with model predictions.
fields
cond-mat.mes-hall 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
One-dimensional Dirac modes in the core of a pentagonal topological crystalline insulator nanowire
Pentagonal SnTe-class nanowires with cationic twin planes are predicted to host two spatially separated helical Dirac modes, one at the core and one at the outer surface.