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Optically detected nuclear magnetic resonance of coherent spins in a molecular complex - Nature Materials
- Researchers demonstrate optical initialization and read-out of nuclear spins in a europium-based molecular complex at 4.2 K.
- The study achieves nuclear Rabi oscillations and Hahn-echo coherence with lifetimes up to 0.61 ms and 2 ms under dynamical decoupling.
- Dynamical decoupling extends spin coherence to about 2 ms with eight refocusing pulses.
- The 21.5 MHz transition shows a narrower inhomogeneous spin linewidth and a distinct optical correlation.
- Optical inhomogeneous linewidths of 23 GHz indicate strain effects tied to crystal quality.
- The work uses a fibre-based ferrule setup immersed in liquid helium for stable, low-temperature operation.
- The experiments identify two ground-state transitions for 151Eu3+ with distinct inhomogeneous linewidths.
- Spectral pits are used to initialize spin states by optically depopulating a hyperfine level.
- The study suggests future improvements via deuteration and purification to further boost coherence.
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