Oxygen-stabilized triangular defects in hexagonal boron nitride

Sebastiaan Huber, E. Gullikson, Robbert Wilhelmus Elisabeth van de Kruijs, Frederik Bijkerk, D. Prendergast

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19 Citations (Scopus)
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Abstract

Recently several experimental transmission electron microscopy (TEM) studies have reported the observation of nanoscale triangular defects in mono- and multilayer hexagonal boron nitride (h-BN). First-principles calculations are employed to study the thermodynamical stability and spectroscopic properties of these triangular defects and the chemical nature of their edge termination. Oxygen-terminated defects are found to be significantly more stable than defects with nitrogen-terminated edges. Simulated x-ray absorption spectra of the boron K edge for oxygen-terminated defects show excellent agreement with experimental x-ray absorption near-edge spectroscopy (XANES) measurements on defective h-BN films with oxygen impurities. Finally, we show that the structural model for oxygen defects in h-BN as deduced from the simulated core-level spectroscopy is intrinsically linked to the equilateral triangle shape of defects as observed in many recent electron microscopy measurements.
Original languageEnglish
Article number245310
Pages (from-to)1-7
Number of pages7
JournalPhysical review B: Condensed matter and materials physics
Volume92
Issue number245310
DOIs
Publication statusPublished - 2016

Keywords

  • METIS-319284
  • IR-102411

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