Experimental determination of giant polarization in wurtzite III-nitride semiconductors.

ABSTRACT: Polarization engineering has revolutionized the photonic and electronic landscape of III-nitride semiconductors over the past decades. However, recent revelations of giant ferroelectric polarization in wurtzite III-nitrides challenge the long-standing paradigms. Here, we experimentally elucidate the polarization, including its magnitude and orientation, and its relationship to lattice polarity in III-nitrides. Those experimentally determined polarizations exceeding 1 C/m² with an upward orientation in metal-polar wurtzite nitride compounds align with recent theoretical predictions. To reconcile these findings, a unified polarization framework is established based on the centrosymmetric layered-hexagonal reference structure. This unified framework redefines the polarization lands

SUBMITTER: Ye H 

PROVIDER: S-EPMC12022134 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature