First-principles calculations show bilayer ZrTe5 realizes a double quantum spin Hall phase with two pairs of helical edge states that transitions to a Z2=1 phase under uniaxial strain.
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Double quantum spin Hall phase in bilayer ZrTe$_5$
First-principles calculations show bilayer ZrTe5 realizes a double quantum spin Hall phase with two pairs of helical edge states that transitions to a Z2=1 phase under uniaxial strain.