DOI: 10.1073/pnas.0710473105. Pressure-induced metallization of silane

Pressure-induced metallization of silane

10.1073/pnas.0710473105

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

There is a great interest in electronic transitions in hydrogen-rich materials under extreme conditions. It has been recently suggested that the group IVa hydrides such as methane (CH 4 ), silane (SiH 4 ), and germane (GeH 4 ) become metallic at far lower pressures than pure hydrogen at equivalent densities because the hydrogen is chemically compressed in group IVa hydride compounds. Here we report measurements of Raman and infrared spectra of silane under pressure. We find that SiH 4 undergoes three phase transitions before becoming opaque at 27–30 GPa. The vibrational spectra indicate the material transforms to a polymeric (framework) structure in this higher pressure range. Room-temperature infrared reflectivity data reveal that the material exhibits Drude-like metallic behavior above 60 GPa, indicating the onset of pressure-induced metallization.

Bibliography

Chen, X.-J., Struzhkin, V. V., Song, Y., Goncharov, A. F., Ahart, M., Liu, Z., Mao, H., & Hemley, R. J. (2008). Pressure-induced metallization of silane. Proceedings of the National Academy of Sciences, 105(1), 20â23.

Authors 8

Xiao-Jia Chen (first)
Viktor V. Struzhkin (additional)
Yang Song (additional)
Alexander F. Goncharov (additional)
Muhtar Ahart (additional)
Zhenxian Liu (additional)
Ho-kwang Mao (additional)
Russell J. Hemley (additional)

References 26 Referenced 140

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Dates

Type	When
Created	17 years, 8 months ago (Dec. 27, 2007, 8:33 p.m.)
Deposited	3 years, 4 months ago (April 12, 2022, 4:22 p.m.)
Indexed	1 week, 1 day ago (Aug. 23, 2025, 9:34 p.m.)
Issued	17 years, 7 months ago (Jan. 8, 2008)
Published	17 years, 7 months ago (Jan. 8, 2008)
Published Online	17 years, 7 months ago (Jan. 8, 2008)
Published Print	17 years, 7 months ago (Jan. 8, 2008)

Funders 0

None

BibTeX

@article{Chen_2008, title={Pressure-induced metallization of silane}, volume={105}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0710473105}, DOI={10.1073/pnas.0710473105}, number={1}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Chen, Xiao-Jia and Struzhkin, Viktor V. and Song, Yang and Goncharov, Alexander F. and Ahart, Muhtar and Liu, Zhenxian and Mao, Ho-kwang and Hemley, Russell J.}, year={2008}, month=jan, pages={20–23} }

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