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首页> 外文期刊>Physica status solidi, B. Basic research >Structural phase transitions of Ga2Se3 and GaSe under high pressure
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Structural phase transitions of Ga2Se3 and GaSe under high pressure

机译：Ga2Se3和GaSe在高压下的结构相变

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High pressure X-ray powder diffraction studies have been made on alpha -Ga2Se3 up to 27 GPa and epsilon -GaSe up to 64 GPa by using synchrotron radiation. A structural phase transition is observed for alpha -Ga2Se3 at II GPa, as is observed in beta -Ga2Se3. The diffraction patterns of the high pressure phases of alpha- and beta -Ga2Se3 are almost the same, showing that the structures of the high pressure phases of both a- and beta -Ga2Se3 are the same. On the other hand, the structural phase transition for epsilon -GaSe is observed near 25 GPa. The diffraction pattern of the high pressure phase of GaSe is similar to that of Ga2Se3. This shows that the high pressure phase of GaSe is similar to that of Ga2Se3, although the atomic concentrations in the alloys are different between Ga2Se3 and GaSe. Most of the diffraction profile of the high pressure phase is explained by a NaCl type structural model, suggesting that the high pressure phase has a structure similar to NaCl. [References: 9]
机译：通过使用同步加速器辐射，对高达27 GPa的α-Ga2Se3和高达64 GPa的ε-GaSe进行了高压X射线粉末衍射研究。如在β-Ga2Se3中观察到的，在II GPa处观察到α-Ga2Se3的结构相变。 α-和β-Ga2 Se 3的高压相的衍射图几乎相同，表明α-和β-Ga 2 Se 3的高压相的结构相同。另一方面，在25 GPa附近观察到ε-GaSe的结构相变。 GaSe高压相的衍射图与​​Ga2Se3相似。这表明，尽管Ga2Se3和GaSe合金中的原子浓度不同，但GaSe的高压相与Ga2Se3的相类似。高压相的大部分衍射图由NaCl型结构模型解释，这表明高压相具有类似于NaCl的结构。 [参考：9]

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