Molecular hydrogen in a -Si: H
1987; American Physical Society; Volume: 59; Issue: 4 Linguagem: Inglês
10.1103/revmodphys.59.835
ISSN1539-0756
AutoresYves J. Chabal, C. K. N. Patel,
Tópico(s)Atomic and Subatomic Physics Research
ResumoThe past few years have seen a number of studies involving the presence of molecular hydrogen trapped in $a$-Si: H. The main techniques used have been nuclear magnetic resonance, calorimetry, and infrared absorption. The results suggest that ${\mathrm{H}}_{2}$ is trapped in a number of samples in microbubbles (\ensuremath{\approx} 10 \AA{}) under high pressure (\ensuremath{\approx} 2 kbar) at room temperature, solidifies around 25 K, and undergoes an orientational phase transition around 15 K. The data are reviewed here, and the effects that such ${\mathrm{H}}_{2}$ microbubbles may have on the properties of $a$-Si: H are discussed.
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