Boron vacancy color center in diamond: Ab initio study

Muruganathan, Manoharan; Mizuta, Hiroshi

doi:10.1016/j.diamond.2021.108341

Cited by 4 publications

(13 citation statements)

References 35 publications

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“…6(c)], above which it can start an optical transition from a triplet ground state to a triplet excited state. This threshold is similar to a calculated ZPL (3.22 eV) of the spin-conserving transition of BV - [38].…”

Section: Optically Induced Spin Polarization Of Bvcentersupporting

confidence: 88%

“…Thus, the ground state of BVis supposedly located at around E C -3.7 eV (E V + 1.8 eV). This valence-band-side level matches the calculated (−/0) levels of BV : E V + 1.5-1.6 eV [32,37,38], supporting our identification from the viewpoint of energy levels.…”

Section: Optically Induced Spin Polarization Of Bvcentersupporting

confidence: 87%

“…Spin-selective intersystem crossing (ISC) from 3 E to 1 A 1 caused by the phonon-mediated spin-orbit coupling is crucial in its efficient optical spin polarization [58,59]. First-principles calculations on BVpredicted the spin-conserving transition from a 3 A 2 triplet ground state to a 3 E triplet excited state; however, its intermediate singlet states were not calculated [37,38]. Our observation indicates that the BVcenter has intermediate singlet state(s), common to the NVsystem.…”

Section: Optically Induced Spin Polarization Of Bvcentermentioning

confidence: 99%

“…1(c), the BVcenter with four valence electrons also realizes a spin-1 system with the e x and e y levels [32,37,38], which is exactly identical to those of NVand OV 0 . First-principles calculations predicted that the BVcenter is optically active with a triplet ground state and a triplet excited state in the band gap, suggesting it is a promising spin qubit [37,38]. Since both boron and nitrogen atoms are the most major impurities in diamond, the BVcenter might have potential comparable to that of the promising NVcenter.…”

Section: Introductionmentioning

confidence: 96%

“…On the other hand, a new family of NV --like defects possessing C 3v symmetry with a pair of substitutional impurity and adjacent vacancy and triplet (S = 1) ground states has been searched for by replacing the nitrogen atom with a firstrow element such as oxygen [32][33][34][35][36] and boron [32,37,38]. Figure 1(a) to 1(c) show schematic views of the one-electron state levels for the family of NV -, OV 0 , and BV -, respectively * Corresponding author: umeda.takahide.fm@u.tsukuba.ac.jp (see Appendix A for details).…”

Section: Introductionmentioning

confidence: 99%

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Negatively charged boron vacancy center in diamond

Umeda

Watanabe

Hara³

et al. 2022

Phys. Rev. B

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Impurity-vacancy complexes in diamond are an attractive family of spin defects since NV -, SiV -, GeV -, and SnVhave emerged as promising platforms for quantum applications. Although boron is most easily incorporated into diamond, a boron-vacancy complex in the negative charge state (BV -) has eluded experimental observation. This center was theoretically predicted as another promising spin qubit. In this work, we experimentally observed an electron paramagnetic resonance (EPR) spectrum identified as BVin synthetic diamonds via a Fermi-level tuning. Fingerprints of BVsuch as the spin multiplicity of S = 1, C 3v symmetry, and the zero-field splitting (D = 2913 MHz), in addition to 10 B and 11 B hyperfine (HF) interactions, have been confirmed. Moreover, optically pumped spin polarization has been observed with 3.0-3.6 eV excitation. However, unlike the NVcenter, the photoluminescence as well as optically detected magnetic resonance from BVhave not been confirmed even at low temperatures. We speculate that the Jahn-Teller instability in the triplet excited states of the NVand BVcenters results in different optical properties.

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Section: Optically Induced Spin Polarization Of Bvcentersupporting

confidence: 88%

Section: Optically Induced Spin Polarization Of Bvcentersupporting

confidence: 87%

Section: Optically Induced Spin Polarization Of Bvcentermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Negatively charged boron vacancy center in diamond

Umeda

Watanabe

Hara³

et al. 2022

Phys. Rev. B

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Evaluating diffusion barriers of defects in boron ion implanted diamond

Tandon,

Grotjohn,

Albrecht

2024

Diamond and Related Materials

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Clock transitions generated by defects in silica glass

Sheehan,

Chen,

Friedman

2024

Applied Physics Letters

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Clock transitions (CTs) in spin systems, which occur at avoided level crossings, enhance quantum coherence lifetimes T2 because the transition becomes immune to the decohering effects of magnetic field fluctuations to first order. We present the first electron-spin resonance characterization of CTs in certain defect-rich silica glasses, noting coherence times up to 16 μs at the CTs. We find CT behavior at zero magnetic field in borosilicate and aluminosilicate glasses, but not in a variety of silica glasses lacking boron or aluminum. Annealing reduces or eliminates the zero-field signal. Since boron and aluminum have the same valence and are acceptors when substituted for silicon, we suggest the observed CT behavior could be generated by a spin-1 boron vacancy center within the borosilicate glass, and similarly, an aluminum vacancy center in the aluminosilicate glass.

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Boron vacancy color center in diamond: Ab initio study

Cited by 4 publications

References 35 publications

Negatively charged boron vacancy center in diamond

Negatively charged boron vacancy center in diamond

Evaluating diffusion barriers of defects in boron ion implanted diamond

Clock transitions generated by defects in silica glass

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