Zigzag germanene nanoribbons thinner than about two nanometers lose their 2D topological edge states and instead develop mirror-and-time-reversal-protected zero-dimensional end states, claimed as the first 1D topological insulator with strong spin-orbit coupling.
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Realization of a one-dimensional topological insulator in ultrathin germanene nanoribbons
Zigzag germanene nanoribbons thinner than about two nanometers lose their 2D topological edge states and instead develop mirror-and-time-reversal-protected zero-dimensional end states, claimed as the first 1D topological insulator with strong spin-orbit coupling.