In-plane ferroelectricity and enhanced piezoelectricity in ultrathin AlN (101̄0) surfaces
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Using density functional theory, we investigate the in-plane ferroelectricity and piezoelectricity of the w-AlN (101̄0) surface in ultrathin films composed of 2-5 w-AlN layers. We find that these few-layer structures are stable in both a ferroelectric wurtzit... ...
