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Internal Stress-Related Vibrational Splitting in Compressed SiO2
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2021-08-31 , DOI: 10.1002/pssb.202100283 Siyang Guo 1 , Qiang Zhou 1 , Yalan Yan 2 , Caizi Zhang 1 , Xinmiao Wei 1 , Liang Li 1 , Fangfei Li 1
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2021-08-31 , DOI: 10.1002/pssb.202100283 Siyang Guo 1 , Qiang Zhou 1 , Yalan Yan 2 , Caizi Zhang 1 , Xinmiao Wei 1 , Liang Li 1 , Fangfei Li 1
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The intriguing vibrational splitting of SiO2 (α-quartz) is investigated via high-pressure Raman spectroscopy. The degenerate E(LO + TO) modes, including the 128 and 265 cm−1 vibrations, exhibit a splitting upon compression, and the splitting is found to depend on the initial stress conditions of the sample. The larger the initial stress, the earlier the splitting occurs. When the internal stress is released during compression, the vibrational splitting under pressure is effectively postponed. The study provides a reasonable explanation for the obviously different splitting pressures of E(LO + TO) modes in compressed SiO2 (α-quartz) in previous reports.
中文翻译：
压缩 SiO2 中与内部应力相关的振动分裂
通过高压拉曼光谱研究了 SiO 2（α-石英）有趣的振动分裂。简并 E(LO + TO) 模式，包括 128 和 265 cm -1振动，在压缩时表现出分裂，并且发现分裂取决于样品的初始应力条件。初始应力越大，分裂发生得越早。当压缩过程中释放内应力时，有效地推迟了压力下的振动分裂。该研究为之前报道中压缩 SiO 2 (α-石英) 中E(LO + TO) 模式明显不同的分裂压力提供了合理的解释。
更新日期：2021-08-31
中文翻译：
压缩 SiO2 中与内部应力相关的振动分裂
通过高压拉曼光谱研究了 SiO 2（α-石英）有趣的振动分裂。简并 E(LO + TO) 模式，包括 128 和 265 cm -1振动，在压缩时表现出分裂，并且发现分裂取决于样品的初始应力条件。初始应力越大，分裂发生得越早。当压缩过程中释放内应力时，有效地推迟了压力下的振动分裂。该研究为之前报道中压缩 SiO 2 (α-石英) 中E(LO + TO) 模式明显不同的分裂压力提供了合理的解释。
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