Carbon-based single photon emitters in hexagonal boron nitride with triplet ground state

Abstract

Most single photon emitters in hexagonal boron nitride has been identified as carbon-based defects. These defects, when forming a donor-acceptor pair have spin $S\le \frac{1}{2}$. By means of density functional calculations, we show that two non-adjacent carbon substitutional defects of the same type (i.e. C${}_{\mathrm{B}}$-C${}_{\mathrm{B}}$, and C${}_{\mathrm{N}}$-C${}_{\mathrm{N}}$), can have a triplet ground state. In particular, one of such defects has a zero phonon line energy of 2.5 eV, and its triplet state is nearly 0.5 eV more stable than its singlet.

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Cited by in corpus (4)

• Quantum sensing and imaging with spin defects in hexagonal boron nitride
• Violet to near-infrared optical addressing of spin pairs in hexagonal boron nitride
• A charge transfer mechanism for optically addressable solid-state spin pairs
• Generation of phonon quantum states and quantum correlations among single photon emitters in hexagonal boron nitride