Observation of the Ge-vacancy color center in microcrystalline diamond films

Ralchenko, V.G.; Седов, В. С.; Khomich, А.А.; Кривобок, В. С.; Nikolaev, S. N.; Savin, Sergey; Власов, И. И.; Konov, V. I.

doi:10.3103/s1068335615060020

Cited by 62 publications

(44 citation statements)

References 9 publications

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“…Finally, all the parameters could be derived or read out from the calculated APES (see Table I), thus one can setup the full Hamiltonian in Eq. (7). It is intriguing to use X as a continuous variable at Y = 0 in Eq.…”

Section: Parameters From Ab Initio Calculationsmentioning

confidence: 99%

“…It is intriguing to use X as a continuous variable at Y = 0 in Eq. (7), and plot the solution in Fig. 3(b).…”

Section: Parameters From Ab Initio Calculationsmentioning

confidence: 99%

“…We thank the National Information Infrastructure Development Program for the high-performance computing resources in Hungary. (7) and optical levels of XV(0) defects. The δ is the energy difference between the 3 A2u and 3 Eu states.…”

Section: Data Availabilitymentioning

confidence: 99%

“…Splitvacancy complexes of group-IV impurity atom (X=Si, Ge, Sn, Pb) and vacancy, i.e., XV defects with D 3d symmetry are in the focus of intense research. The negatively charged XV, i.e., XV(−) defects have S = 1/2 spin state and fluoresce mostly in the visible [1][2][3][4][5][6][7][8][9][10][11]. The inversion symmetry of the centers assumes virtually no Stark-shift in the optical signals which is a prerequisite for realization of indistinguishable single photon sources.…”

Section: Introductionmentioning

confidence: 99%

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The (eg ⊗ eu) ⊗ Eg product Jahn–Teller effect in the neutral group-IV vacancy quantum bits in diamond

Thiering

Gali

2019

npj Comput Mater

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The product Jahn-Teller (pJT) effect may occur for such coupled electron-phonon systems in solids where single electrons occupy double degenerate orbitals. We propose that the excited state of the neutral XV split-vacancy complex in diamond, where X and V labels a group-IV impurity atom of X=Si, Ge, Sn, Pb and the vacancy, respectively, is such a system with eg and eu double degenerate orbitals and Eg quasi-localized phonons. We develop and apply ab initio theory to quantify the strength of electron-phonon coupling for neutral XV complexes in diamond, and find a significant impact on the corresponding optical properties of these centers. Our results show good agreement with recent experimental data on the prospective SiV(0) quantum bit, and reveals the complex nature of the excited states of neutral XV color centers in diamond.

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Section: Parameters From Ab Initio Calculationsmentioning

confidence: 99%

“…It is intriguing to use X as a continuous variable at Y = 0 in Eq. (7), and plot the solution in Fig. 3(b).…”

Section: Parameters From Ab Initio Calculationsmentioning

confidence: 99%

Section: Data Availabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The (eg ⊗ eu) ⊗ Eg product Jahn–Teller effect in the neutral group-IV vacancy quantum bits in diamond

Thiering

Gali

2019

npj Comput Mater

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“…Revised: 15 December 2017 Investigation of isotopic effects on the photoluminescence of split-vacancy centers in diamond allows one to obtain deeper insight into their electronic, structural and optical properties. Due to the bright and almost monochromatic luminescence, the two already-known representatives of these class of defects SiV and recently discovered GeV [1][2][3][4] are considered as possible candidates for single-phonon emitters in quantum communications or photoluminescence markers in biomedical applications. Although the attractiveness of these centers is mostly caused by the large Debye-Waller factor (the intensity of the ZPL relative to the overall intensity of the center emission), the study of the luminescence sideband is still very informative.…”

mentioning

confidence: 99%

Isotopic effects in impurityvacancy complexes in diamond

Екимов¹,

Кривобок²,

Lyapin³

et al. 2018

Nanosystems: Phys. Chem. Math.

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We consider isotopic effects on the photoluminescence of recently discovered germanium-vacancy (GeV − ) color center in diamond produced by the high-pressure high-temperature (HPHT) treatment. It was demonstrated that the influence of isotopic composition on the position of zero-phonon line (ZPL) and its first vibronic peak (local vibrational mode, LVM) provides valuable information on the electronic and structural properties of this center.Keywords: diamond, defects, color centers, split-vacancy, high pressures. : 19 June 2017. Revised: 15 December 2017 Investigation of isotopic effects on the photoluminescence of split-vacancy centers in diamond allows one to obtain deeper insight into their electronic, structural and optical properties. Due to the bright and almost monochromatic luminescence, the two already-known representatives of these class of defects SiV and recently discovered GeV [1][2][3][4] are considered as possible candidates for single-phonon emitters in quantum communications or photoluminescence markers in biomedical applications. Although the attractiveness of these centers is mostly caused by the large Debye-Waller factor (the intensity of the ZPL relative to the overall intensity of the center emission), the study of the luminescence sideband is still very informative. ReceivedIn this paper, we discuss only negatively charged GeV center which was produced in nano-and microdiamonds by HPHT synthesis from organic substances [4,5]. This split-vacancy complex consists of impurity atoms located almost midway between two vacant cites. Ideally the symmetry of the center is 3m. However, due to the incompletely filled doubly degenerate impurity electron level in the diamond band gap, this structure is Jahn-Teller unstable and the degeneracy should be lifted. Thus, the actual symmetry of the center should be lower. It is believed that the physical mechanism, which lifts this degeneracy in split-vacancy centers is caused by the spinorbit coupling [4,6,7]. Thus, the fluorescence line caused by the promotion of an electron from the lower e u level to this incompletely filled e g one (with separation energy of about 2.059 eV), is split into quadruplet Z 1−4 with two characteristic splitting energies 0.2 and 1.1 THz (corresponding to the energy difference in e g and e u levels respectively). This splitting is clearly seen in Fig. 1a-b) and Fig. 2a). Still, according to electronic paramagnetic resonance measurements, the trigonal symmetry of the center is retained [8,9]. Oscillation of the heavy impurity Ge atom gives rise to LVM in the diamond phonon spectrum which is observed ≈ 45 meV apart from the strongest component of ZPL line in the fluorescence sideband of this center (see Fig. 1a-b). Both the absolute energy of the strongest component of ZPL (Z 1 ) and relative energy of LVM (L 1 ) almost linearly depends on the isotope number of Ge atom m (see Fig. 1c). In the harmonic approximation, the LVM energy scales as a square root of the mass of oscillating atom but due to the small relative range δm = m − ...

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Tailoring of Typical Color Centers in Diamond for Photonics

et al. 2020

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On the demand of single‐photon entangled light sources and high‐sensitivity probes in the fields of quantum information processing, weak magnetic field detection and biosensing, the nitrogen vacancy (NV) color center is very attractive and has been deeply and intensively studied, due to its convenience of spin initialization, operation, and optical readout combined with long coherence time in the ambient environment. Although the application prospect is promising, there are still some problems to be solved before fully exerting its characteristic performance, including enhancement of emission of NV centers in certain charge state (NV− or NV0), obtaining indistinguishable photons, and improving of collecting efficiency for the photons. Herein, the research progress in these issues is reviewed and commented on to help researchers grasp the current trends. In addition, the development of emerging color centers, such as germanium vacancy defects, and rare‐earth dopants, with great potential for various applications, are also briefly surveyed.

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Observation of the Ge-vacancy color center in microcrystalline diamond films

Cited by 62 publications

References 9 publications

The (eg ⊗ eu) ⊗ Eg product Jahn–Teller effect in the neutral group-IV vacancy quantum bits in diamond

The (eg ⊗ eu) ⊗ Eg product Jahn–Teller effect in the neutral group-IV vacancy quantum bits in diamond

Isotopic effects in impurityvacancy complexes in diamond

Tailoring of Typical Color Centers in Diamond for Photonics

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