Quasiparticle self-consistent GW theory is required for reliable electronic properties in multilayer α-In₂Se₃, as DFT and hybrid functionals incorrectly predict gaps, charge density, polarization, and band offsets.
Applications of modern ferroelectrics
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Many-body description of two-dimensional van der Waals ferroelectric $\alpha-$In$_2$Se$_3$
Quasiparticle self-consistent GW theory is required for reliable electronic properties in multilayer α-In₂Se₃, as DFT and hybrid functionals incorrectly predict gaps, charge density, polarization, and band offsets.