Abstract
The electronic structure of the E2′ defect in quartz is investigated for the first time by the pulsed electron paramagnetic resonance spectroscopy. The temperature dependence of the longitudinal and transverse relaxations and the possible mechanisms lying behind are carefully characterized. With the pulsed electron–nuclear double resonance spectroscopy, a magnetically coupled proton is confirmed to exist in the E2′ center. The observed long T2 over 260 μs at 60 K, as well as the well-separated energy levels arising from the proton-coupled electron–nuclear structure, makes E2′ center a good candidate for quantum memory in quantum computing.
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