Fano's theory of configuration interaction has been extended to Jahn-Teller systems. Homogeneous broadening and shift of the zero-phonon lines are directly connected with interlevel spin-orbit interaction and with the density of states of the interacting continuum. Application to MgO: ${\mathrm{V}}^{2+}$ and ${\mathrm{Al}}_{2}$ ${\mathrm{O}}_{3}$ : ${\mathrm{Cr}}^{3+}$ gives excellent agreement between theory and experiment.Fano's theory of configuration interaction has been extended to Jahn-Teller systems. Homogeneous broadening and shift of the zero-phonon lines are directly connected with interlevel spin-orbit interaction and with the density of states of the interacting continuum. Application to MgO: ${\mathrm{V}}^{2+}$ and ${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$: ${\mathrm{Cr}}^{3+}$ gives excellent agreement between theory and experiment.

Physical Review LettersSep 22, 198013 citations

Electron-phonon interaction in Fermi systems

Laura Romanó, Valerio Dallacasa

Jan 1, 19880 citations

Dynamic Jahn-Teller Effect in the NV− Center in Diamond

Tesfaye A. Abtew, Yi‐Yang Sun, Bi-Ching Shih +3 more

The negatively charged nitrogen-vacancy (NV(-)) center in diamond is considered to be one of the most promising solid state systems for quantum information applications. Excited states of the NV(-) center play a center role in the proposed applications. Using a combination of first-principles calculations and vibronic interaction model analysis, we establish the presence of a dynamic Jahn-Teller effect in the (3)E excited state. The calculated temperature-dependent dephasing rate for the zero phonon line as well as the splitting of the first two vibronic states are in good agreement with experiment.The negatively charged nitrogen-vacancy (NV(-)) center in diamond is considered to be one of the most promising solid state systems for quantum information applications. Excited states of the NV(-) center play a center role in the proposed applications. Using a combination of first-principles calculations and vibronic interaction model analysis, we establish the presence of a dynamic Jahn-Teller effect in the (3)E excited state. The calculated temperature-dependent dephasing rate for the zero phonon line as well as the splitting of the first two vibronic states are in good agreement with experiment.

Physical Review LettersSep 30, 201199 citations

Strain broadening of the 1042-nm zero phonon line of the NV− center in diamond: A promising spectroscopic tool for defect tomography

Timur Biktagirov, Alexander N. Smirnov, Валерий Александрович Давыдов +4 more

The negatively charged nitrogen-vacancy $({\mathrm{NV}}^{\ensuremath{-}})$ center in diamond is a promising candidate for many quantum applications. Here, we examine the splitting and broadening of the center's infrared (IR) zero-phonon line (ZPL). We develop a model for these effects that accounts for the strain induced by photodependent microscopic distributions of defects. We apply this model to interpret observed variations of the IR ZPL shape with temperature and photoexcitation conditions. We identify an anomalous temperature-dependent broadening mechanism and that defects other than the substitutional nitrogen center significantly contribute to strain broadening. The former conclusion suggests the presence of a strong Jahn-Teller effect in the center's singlet levels and the latter indicates that major sources of broadening are yet to be identified. These conclusions have important implications for the understanding of the center and the engineering of diamond quantum devices. Finally, we propose that, once the major sources of broadening are identified, the IR ZPL has the potential to be a sensitive spectroscopic tool for probing microscopic strain fields and performing defect tomography.The negatively charged nitrogen-vacancy $({\mathrm{NV}}^{\ensuremath{-}})$ center in diamond is a promising candidate for many quantum applications. Here, we examine the splitting and broadening of the center's infrared (IR) zero-phonon line (ZPL). We develop a model for these effects that accounts for the strain induced by photodependent microscopic distributions of defects. We apply this model to interpret observed variations of the IR ZPL shape with temperature and photoexcitation conditions. We identify an anomalous temperature-dependent broadening mechanism and that defects other than the substitutional nitrogen center significantly contribute to strain broadening. The former conclusion suggests the presence of a strong Jahn-Teller effect in the center's singlet levels and the latter indicates that major sources of broadening are yet to be identified. These conclusions have important implications for the understanding of the center and the engineering of diamond quantum devices. Finally, we propose that, once the major sources of broadening are identified, the IR ZPL has the potential to be a sensitive spectroscopic tool for probing microscopic strain fields and performing defect tomography.

arXiv:1701.05631Physical review. B./Physical review. BAug 18, 201716 citations

{\mathrm{V}}^{2+}

and

{\mathrm{Al}}_{2}

{\mathrm{O}}_{3}

{\mathrm{Cr}}^{3+}

gives excellent agreement between theory and experiment.