In thin WTe2 films the topological Z2 invariant oscillates with layer number due to interlayer coupling, producing a thickness-driven transition to a Weyl semimetal.
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Evolution of topological phases in atomically thin WTe2 films
In thin WTe2 films the topological Z2 invariant oscillates with layer number due to interlayer coupling, producing a thickness-driven transition to a Weyl semimetal.