Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1039/c7tc03309e
Lidong Dai _{1,

2,

3} , Yukai Zhuang _{1,

2,

3,

4,

5} , Heping Li _{1,

2,

3} , Lei Wu _{1,

2,

3} , Haiying Hu _{1,

2,

3} , Kaixiang Liu _{1,

2,

3,

4,

5} , Linfei Yang _{1,

2,

3,

4,

5} , Chang Pu _{1,

2,

3,

4,

5}

Affiliation

The structural, vibrational and electronic properties of α-As₂Te₃ in different pressure environments were investigated using a diamond-anvil cell (DAC) in conjunction with AC impedance spectroscopy, Raman spectroscopy, atomic force microscopy and high-resolution transmission electron microscopy up to ∼25 GPa. Under non-hydrostatic conditions, α-As₂Te₃ endured a structural phase transition at ∼6 GPa, and a ∼2 GPa delay in the transition point was observed under hydrostatic conditions. With increasing pressure, amorphization and metallization simultaneously appeared at ∼11 GPa, as characterized by the Raman spectra and temperature-dependent conductivity results. We found that both amorphization and metallization were irreversible after decompression under non-hydrostatic conditions. However, under hydrostatic conditions, both amorphization and metallization were reversible. The unique properties displayed by α-As₂Te₃ in different pressure environments may be attributed to the effects of deviatoric stresses and the interlayer interaction constrained by the pressure medium.

中文翻译：

碲化物中压力诱导的不可逆非晶化和金属化，具有结构相变

的α-作为结构，振动和电子性质₂碲₃与交流阻抗光谱，拉曼光谱，原子力显微镜和高分辨率透射电子显微镜了结合使用金刚石砧细胞（DAC）在不同的压力环境下进行了研究至约25 GPa。在非静水条件，α-作为₂碲₃在〜6 GPa处经历了结构相变，并且在静水条件下观察到转变点有〜2 GPa的延迟。随着压力的增加，非晶化和金属化同时在〜11 GPa处出现，这是通过拉曼光谱和随温度变化的电导率结果表征的。我们发现在非静水压条件下减压后非晶化和金属化都是不可逆的。但是，在静水压条件下，非晶化和金属化都是可逆的。通过显示α-作为独特的性质₂碲₃在不同的压力环境下可以归因于偏应力和由压力介质约束层间相互作用的影响。

更新日期：2017-11-20

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11