Discovery of a weak topological insulating state and van Hove singularity in triclinic RhBi2 – Gunnar Lange

When:
October 28, 2020 @ 11:30 am – 12:30 pm
2020-10-28T11:30:00+00:00
2020-10-28T12:30:00+00:00
Where:
Zoom
Contact:
Angela Harper

Weak topological insulators are phases where topology depends on translational symmetry
and surface states only appear along some direction, usually orthogonal to cleaving planes.
This makes it in general hard to see surface states directly. We present triclinic RhBi2 in [1],
a system with only bulk inversion symmetry, as a natural platform to study weak
topology as the surface states live on the cleaving planes. These surface states
are studied using APRES, DFT and an effective model, from which we find that in addition
to topology, the system also displays a van Hove singularity close to the Fermi energy.
This combination of effects makes the material a very promising platform to study
novel quantum effects.

[1] Discovery of a weak topological insulating state and van Hove singularity in triclinic RhBi2, Kyungchan Lee, et al. arXiv:2009.12502

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* Meeting ID: 857 0241 5099
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