Chalcogen vacancies in W(Se1-xTex)2 bulk crystals induce switchable ferroelectricity and ferromagnetism, producing multiferroic behavior at high vacancy concentrations while tellurium fraction drives a structural transition.
This separation of roles is consistent with recent reports of room-temperature multiferroicity in Te-doped WSe2 [47], where multiferroicity emerges for20%≲δ≲38%
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Defect-induced multiferroicity in bulk solid solutions of WSe$_2$ and WTe$_2$
Chalcogen vacancies in W(Se1-xTex)2 bulk crystals induce switchable ferroelectricity and ferromagnetism, producing multiferroic behavior at high vacancy concentrations while tellurium fraction drives a structural transition.