Ferroelectric and strain-tuned MoSe2/Bi2O2Se van der Waals heterostructure with band alignment evolution

We theoretically propose a MoSe 2 /Bi 2 O 2 Se vdW heterostructure, whose band structure can be modulated within the unipolar barrier structure, type-I, and type-II by utilizing the ferroelectric polarization of Bi 2 O 2 Se and an in-plane biaxial strain.