Natural Ib-IaA diamond shows anticorrelated nitrogen centers with Raman absorption, TEM-revealed nanosized rhombic voids from dislocation dipole annihilation, and spatially heterogeneous 800-900 nm photoluminescence linked to void-wall recombination.
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Diamond crystal with Y-defects: spectroscopy and transmission electron microscopy
Natural Ib-IaA diamond shows anticorrelated nitrogen centers with Raman absorption, TEM-revealed nanosized rhombic voids from dislocation dipole annihilation, and spatially heterogeneous 800-900 nm photoluminescence linked to void-wall recombination.