TY - JOUR
T1 - Experimental evidence of tetrahedral symmetry breaking in SiO2 glass under pressure
AU - Kono, Yoshio
AU - Ohara, Koji
AU - Kondo, Nozomi M.
AU - Yamada, Hiroki
AU - Hiroi, Satoshi
AU - Noritake, Fumiya
AU - Nitta, Kiyofumi
AU - Sekizawa, Oki
AU - Higo, Yuji
AU - Tange, Yoshinori
AU - Yumoto, Hirokatsu
AU - Koyama, Takahisa
AU - Yamazaki, Hiroshi
AU - Senba, Yasunori
AU - Ohashi, Haruhiko
AU - Goto, Shunji
AU - Inoue, Ichiro
AU - Hayashi, Yujiro
AU - Tamasaku, Kenji
AU - Osaka, Taito
AU - Yamada, Jumpei
AU - Yabashi, Makina
N1 - Funding Information:
This research is supported by JSPS KAKENHI (Grant Numbers: 19KK0093 and 20H00201 to Y.K.) and the SACLA/SPring-8 Basic Development Program. The experiments were performed at the BL37XU (JASRI Proposal No.: 2019B1111 and 2020A0600) and BL05XU beamlines of SPring-8.
Funding Information:
This research is supported by JSPS KAKENHI (Grant Numbers: 19KK0093 and 20H00201 to Y.K.) and the SACLA/SPring-8 Basic Development Program. The experiments were performed at the BL37XU (JASRI Proposal No.: 2019B1111 and 2020A0600) and BL05XU beamlines of SPring-8.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Bimodal behavior in the translational order of silicon’s second shell in SiO2 liquid at high temperatures and high pressures has been recognized in theoretical studies, and the fraction of the S state with high tetrahedrality is considered as structural origin of the anomalous properties. However, it has not been well identified in experiment. Here we show experimental evidence of a bimodal behavior in the translational order of silicon’s second shell in SiO2 glass under pressure. SiO2 glass shows tetrahedral symmetry structure with separation between the first and second shells of silicon at low pressures, which corresponds to the S state structure reported in SiO2 liquid. On the other hand, at high pressures, the silicon’s second shell collapses onto the first shell, and more silicon atoms locate in the first shell. These observations indicate breaking of local tetrahedral symmetry in SiO2 glass under pressure, as well as SiO2 liquid.
AB - Bimodal behavior in the translational order of silicon’s second shell in SiO2 liquid at high temperatures and high pressures has been recognized in theoretical studies, and the fraction of the S state with high tetrahedrality is considered as structural origin of the anomalous properties. However, it has not been well identified in experiment. Here we show experimental evidence of a bimodal behavior in the translational order of silicon’s second shell in SiO2 glass under pressure. SiO2 glass shows tetrahedral symmetry structure with separation between the first and second shells of silicon at low pressures, which corresponds to the S state structure reported in SiO2 liquid. On the other hand, at high pressures, the silicon’s second shell collapses onto the first shell, and more silicon atoms locate in the first shell. These observations indicate breaking of local tetrahedral symmetry in SiO2 glass under pressure, as well as SiO2 liquid.
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U2 - 10.1038/s41467-022-30028-w
DO - 10.1038/s41467-022-30028-w
M3 - Article
C2 - 35484122
AN - SCOPUS:85129046132
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 2292
ER -