Topological states on grain boundary of 1T’-MoTe<sub>2</sub>
ORAL
Abstract
We show that on a transition metal dichalcogenides 1T’ MoTe2 two types of grain boundaries can exist and that electronic states associated with themselves strongly depend on their crystal symmetries as well as topological index. Using first-principles computational methods and model Hamiltonian analysis, we investigate their structural stabilities and electronic structures. We clearly demonstrate that one-dimensional metallic state along one of the grain boundaries is a topologically protected state. The spatial symmetries created by grain boundaries is also shown to play an important role in characterizing the protected metallic states.
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Presenters
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Seoung-Hun Kang
- Korea Inst for Advanced Study
- Korea Institute for Advanced Study