Phase relation between supercooled liquid and amorphous silicon

Junpei T. Okada, Patrick H.L. Sit, Ryo Ishikawa, Takehiko Ishikawa, Jinfan Chen, Koji S. Nakayama, Kensaku Maeda, Yoshihiko Yokoyama, Yuki Watanabe, Paul François Paradis, Yasuhiro Watanabe, Susumu Nanao, Yuichi Ikuhara, Kaoru Kimura, Satoshi Uda

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Abstract

The phase relation between supercooled liquid silicon (l-Si) and amorphous silicon (a-Si) is discussed based on experimental results. Electrostatically levitated l-Si samples were supercooled down to low temperatures, 300 K below the melting temperature (Tcl: 1683 K), and solidified accompanied by the release of latent heat. It was found that solidified Si samples melted again at 1480 K caused by the latent heat. Also, it was found that the Si samples that rapidly quenched near the solidification temperature contained a large amount of a-Si with tetrahedral coordination. These two findings show that the supercooled l-Si samples solidified into a-Si and a-Si melted, confirming the idea of a first-order phase transition between two metastable phases proposed by Turnbull et al. [Metall. Mater. Trans. A 29, 1825 (1998)].

Original languageEnglish
Article number093705
JournalApplied Physics Letters
Volume116
Issue number9
DOIs
Publication statusPublished - 2020 Mar 2

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Okada, J. T., Sit, P. H. L., Ishikawa, R., Ishikawa, T., Chen, J., Nakayama, K. S., Maeda, K., Yokoyama, Y., Watanabe, Y., Paradis, P. F., Watanabe, Y., Nanao, S., Ikuhara, Y., Kimura, K., & Uda, S. (2020). Phase relation between supercooled liquid and amorphous silicon. Applied Physics Letters, 116(9), [093705]. https://doi.org/10.1063/1.5129059