Effect of Degradation Processes Caused by a Small Perturbation on the Growth of the Average Cluster Size of Correlated Spins in Multiple Quantum NMR Spectroscopy of Solids

2021 ◽  
Author(s):  
V. E. Zobov ◽  
A. A. Lundin
Keyword(s):  
Nmr Spectroscopy ◽  
Small Perturbation ◽  
Cluster Size ◽  
Multiple Quantum ◽  
Average Cluster Size ◽  
Degradation Processes ◽  
Average Cluster ◽  
Multiple Quantum Nmr

Multiple Quantum NMR Study of Hydrogen Clustering in Amorphous Silicon

1986 ◽  
Vol 70 ◽  
Author(s):  
Karen K. Gleason ◽  
J. Baum ◽  
A. N. Garroway ◽  
A. Pines ◽  
J. A. Reimer
Keyword(s):  
Amorphous Silicon ◽  
Hydrogen Content ◽  
Dipole Interaction ◽  
Multiple Quantum ◽  
Average Cluster Size ◽  
High Hydrogen ◽  
Nmr Study ◽  
Average Cluster ◽  
Very High ◽  
Multiple Quantum Nmr

ABSTRACTBecause Multiple Quantum NMR coherences occur only between spins which are coupled together by the dipole interaction, this technique has been used to study the clustering of hydrogen in amorphous silicon. The clustered hydrogen was found to be associated with the broad line of the single quantum NMR spectra. For device quality films, the average cluster size is approximately six protons. The concentration of these five to seven atom defects increases with increasing hydrogen content until, at very high hydrogen content, the clusters are replaced by a continuous network of silicon-hydrogen bonds.

Clustering in some randomly occupied two- and three-dimensional lattices

2004 ◽  
Vol 82 (4) ◽  
pp. 323-329
Author(s):  
A Ulug ◽  
M Karakaplan ◽  
B Ulug
Keyword(s):  
Percolation Threshold ◽  
Coordination Number ◽  
Cluster Size ◽  
Three Dimensional ◽  
Occupation Probability ◽  
Average Cluster Size ◽  
Number Of Clusters ◽  
Size Dimension ◽  
Average Cluster

Clustering in some two- and three-dimensional lattices is investigated using an algorithm similar to that of Hoshen–Kopelman. The total number of clusters reveals a maximum at an occupation probability, pmax, where the average cluster size, 2.03 ± 0.07, is found to be independent of the size, dimension, coordination number, and the type of lattice. We discussed the fact that the clustering effectively begins at pmax. The percolation threshold, pc, and pmax are found to get closer to each other as the coordination number increases. PACS Nos.: 64.60.Ht, 64.60.Qb, 82.30.Nr

Measurement of Long-Range Cross-Correlation Rates Using a Combination of Single- and Multiple-Quantum NMR Spectroscopy in One Experiment

2002 ◽  
Vol 124 (15) ◽  
pp. 4050-4057 ◽  
Author(s):  
Dominique Früh ◽  
Elisabetta Chiarparin ◽  
Philippe Pelupessy ◽  
Geoffrey Bodenhausen
Keyword(s):  
Nmr Spectroscopy ◽  
Long Range ◽  
Cross Correlation ◽  
Multiple Quantum ◽  
Multiple Quantum Nmr
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