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- W2080609124 abstract "$^{6}text{L}text{i}$ spin-alignment echo (SAE) nuclear-magnetic-resonance (NMR) spectroscopy is used to monitor single-particle two-time correlation functions in ${text{LiAlSi}}_{2}{text{O}}_{6}$ glass. The method, here applied in the temperature range from 300 to 400 K, is sensitive to ultraslow Li hopping processes with rates $(1/{ensuremath{tau}}_{text{SAE}})$ down to 10 jumps/s. The use of a sample with natural $^{6}text{L}text{i}$ abundance allowed the measurement of pure NMR spin-alignment echoes which are damped with increasing mixing time exclusively by slow Li jumps, i.e., free of influences arising from, e.g., interfering spin-diffusion effects. The considerably stretched correlation functions reveal the presence of a broad distribution of jump rates. The results are comprehensively compared with those recently obtained from both $^{7}text{L}text{i}$ SAE and $^{7}text{L}text{i}$ spin-lattice relaxation NMR as well as from dc conductivity measurements. Interestingly, the activation energy of the latter, which are sensitive to long-range Li transport parameters, is in good agreement with that microscopically probed by $^{6}text{L}text{i}$ SAE NMR, here." @default.
- W2080609124 created "2016-06-24" @default.
- W2080609124 creator A5004265097 @default.
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- W2080609124 date "2008-08-12" @default.
- W2080609124 modified "2023-10-11" @default.
- W2080609124 title "Atomic-scale measurement of ultraslow Li motions in glassy<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>LiAlSi</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>O</mml:mtext><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>by two-time<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mtext>L</mml:mtext><mml:mprescripts /><mml:none /><mml:mn>6</mml…" @default.
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- W2080609124 doi "https://doi.org/10.1103/physrevb.78.054303" @default.
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