Solid-state silicon-29 spin-lattice relaxation in several 2:1 phyllosilicate minerals

1985 ◽  
Vol 89 (15) ◽  
pp. 3305-3310 ◽  
Author(s):  
Peter F. Barron ◽  
Phillip Slade ◽  
Raymond L. Frost
Science ◽  
2018 ◽  
Vol 361 (6397) ◽  
pp. 60-63 ◽  
Author(s):  
Brendon C. Rose ◽  
Ding Huang ◽  
Zi-Huai Zhang ◽  
Paul Stevenson ◽  
Alexei M. Tyryshkin ◽  
...  

Engineering coherent systems is a central goal of quantum science. Color centers in diamond are a promising approach, with the potential to combine the coherence of atoms with the scalability of a solid-state platform. We report a color center that shows insensitivity to environmental decoherence caused by phonons and electric field noise: the neutral charge state of silicon vacancy (SiV0). Through careful materials engineering, we achieved >80% conversion of implanted silicon to SiV0. SiV0 exhibits spin-lattice relaxation times approaching 1 minute and coherence times approaching 1 second. Its optical properties are very favorable, with ~90% of its emission into the zero-phonon line and near–transform-limited optical linewidths. These combined properties make SiV0 a promising defect for quantum network applications.


2001 ◽  
Vol 123 (29) ◽  
pp. 7094-7100 ◽  
Author(s):  
John B. Grutzner ◽  
Kevin W. Stewart ◽  
Roderick E. Wasylishen ◽  
Michael D. Lumsden ◽  
Cecil Dybowski ◽  
...  

1989 ◽  
Vol 62 (1) ◽  
pp. 82-97 ◽  
Author(s):  
Mladen Andreis ◽  
Juwhan Liu ◽  
Jack L. Koenig

Abstract Molecular motions in sulfur-vulcanized NR are investigated by solid state 13C NMR relaxation techniques. Since the high-resolution spectra of crosslinked samples exhibit overlapping in the aliphatic region, a combined application of variable temperature spin-lattice relaxation measurements and the computer simulation of the overlapped spectral region is used in order to detect resonance signals. Motional restrictions introduced by crosslinks are investigated from the temperature dependence of nT1 relaxation times for individual carbons. The V-curves for all polyisoprene signals and for the detectable signals arising from the network units exhibit a similar general trend with increased curing time: curve broadening, shift of the minima to higher temperatures, and increase of the T1 min values. All the backbone carbons show quantitatively similar effects of vulcanization on the spin-lattice relaxation. At shorter curing times, motional restrictions for the methyl side group are more pronounced compared to the main-chain carbons. The experimental data suggest that the isotropic motion is strongly affected by the crosslinking. Librational motion is less affected, while the change in rotational motion has no significant influence on the relaxation curve. Although experimental data cover a relatively narrow temperature range, not sufficiently wide for a more accurate quantitative analysis, the results indicate that concepts of plural correlation times and a distribution of correlation times are applicable.


1985 ◽  
Vol 119 (2-3) ◽  
pp. 251-255 ◽  
Author(s):  
D.J. Siminovitch ◽  
M.J. Ruocco ◽  
E.T. Olejniczak ◽  
S.K. Das Gupta ◽  
R.G. Griffin

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