Dynamical Jahn-Teller Effect in Paramagnetic Resonance Spectra: Orbital Reduction Factors and Partial Quenching of Spin-Orbit Interaction

Ham, Frank S.

doi:10.1103/physrev.138.a1727

Cited by 848 publications

(274 citation statements)

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“…As seen in the JT-SO spectra in some cases ( 2 E ′ and 2 E ′′ states of TiF 3 , 4 E ′ state of CrF 3 , 5 E ′ state of MnF 3 ), SO coupling is strongly quenched by a strong or moderately strong JT effect at the origin of the spectrum. The quenching factor 16 increases with the increase of JT coupling strength. The states where SO coupling and JT coupling are of equal strength ( 5 E ′′ state of MnF 3 and 5 E ′′ state of CoF 3 ), weak SO coupling is partially quenched by the moderate JT effect at the origin of the spectrum.…”

Section: Internal Vibronic Spectramentioning

confidence: 99%

“…The JT effect and the effect of SO coupling tend to quench each other. 16 This phenomenon is particularly interesting when they are of comparable magnitudes which often is the case in first-and second-row transition-metal complexes.…”

Section: Jahn and E Teller In 1937mentioning

confidence: 99%

“…16,[21][22][23] Such empirical models are appropriate for impurity atoms with partially occupied inner shells in a rigid crystal environment. In molecules, metal-molecule complexes and atomic clusters, on the other hand, which are less rigid and often perform large-amplitude nuclear motions upon electronic excitation, a more accurate treatment of the SO interaction may be necessary.…”

Section: Jahn and E Teller In 1937mentioning

confidence: 99%

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Jahn–Teller and spin–orbit coupling effects in transition-metal trifluorides

et al. 2011

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Section: Internal Vibronic Spectramentioning

confidence: 99%

Section: Jahn and E Teller In 1937mentioning

confidence: 99%

Section: Jahn and E Teller In 1937mentioning

confidence: 99%

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Jahn–Teller and spin–orbit coupling effects in transition-metal trifluorides

et al. 2011

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“…These results open the door for exploration of long-lived quantum memories based on SiV − centers and the development of spin-photon interfaces benefiting from unique optical properties. 29 Si which has nuclear spin I ¼ 1 2 . The nuclear Zeeman shift is reversed for the opposite electronic spin, and so the two nuclear-spin-conserving Λ schemes occur at different relative laser detunings.…”

Section: H Y S I C a L R E V I E W L E T T E R Smentioning

confidence: 99%

“…This is fundamentally limited by orbital relaxation, and an understanding of this process opens the way to extend coherence by engineering interactions with phonons. Hyperfine structure is observed in CPT measurements with the 29 Si isotope which allows access to nuclear spin. These results establish the SiV − center as a solid-state spin-photon interface.…”

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confidence: 99%

Diamond Spins Shining Bright

Burkard¹

2014

Physics

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The silicon-vacancy (SiV − ) color center in diamond has attracted attention because of its unique optical properties. It exhibits spectral stability and indistinguishability that facilitate efficient generation of photons capable of demonstrating quantum interference. Here we show optical initialization and readout of electronic spin in a single SiV − center with a spin relaxation time of T 1 ¼ 2.4 AE 0.2 ms. Coherent population trapping (CPT) is used to demonstrate coherent preparation of dark superposition states with a spin coherence time of T ⋆ 2 ¼ 35 AE 3 ns. This is fundamentally limited by orbital relaxation, and an understanding of this process opens the way to extend coherence by engineering interactions with phonons. Hyperfine structure is observed in CPT measurements with the 29 Si isotope which allows access to nuclear spin. These results establish the SiV − center as a solid-state spin-photon interface. DOI: 10.1103/PhysRevLett.113.263602 PACS numbers: 42.50.Gy, 03.67.Lx, 42.50.Ex, 61.72.jn Coherent quantum systems which efficiently couple long-lived quantum memories to optical photons are a key resource for realizing quantum networks [1]. Color centers in diamond [2] are attractive candidates owing to unique properties of diamond, which include optical transparency and a high lattice quality that allows spin to function as long-lived quantum memory [3]. The negative silicon-vacancy (SiV − ) defect in diamond [4-6] has exceptional optical properties that facilitate efficient generation of indistinguishable photons from multiple distinct emitters [7]. Here we show optical initialization and readout of electronic spin in a single SiV − center with a spin relaxation time of T 1 ¼ 2.4 AE 0.2 ms. Two-photon resonance [8] is used to demonstrate coherent preparation of dark superposition states with a spin coherence time of T ⋆ 2 ¼ 35 AE 3 ns. This is shown to be limited by orbital relaxation that may be suppressed by engineering interactions with phonons. We present the first evidence of hyperfine interaction with a 29 Si nuclear spin in SiV − which can potentially be used as a memory qubit [9].Quantum information processing efforts in diamond have mainly focused on the nitrogen-vacancy (NV − ) center because of its excellent spin properties at ambient conditions [10]. All-optical access to NV − spin is possible [11][12][13][14]; however, its large phonon sideband and spectral diffusion reduce coherent photon generation rates and limit the development of NV − quantum networks [15][16][17]. The main optical advantage provided by the SiV − center is that 70% of its fluorescence is concentrated in a sharp zero-phonon line (ZPL), making it ideal for single photon source applications [18,19]. It is spectrally stable at 737 nm, exhibits line widths limited by the excited state lifetime [20], and can be coupled to optical cavities [21,22]. Physically, the SiV − center consists of a single silicon atom replacing two carbon atoms in the diamond lattice, forming D 3d symmetry as illustrated in Fig. 1(a) [4][5]...

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