Jump to main content
Jump to site search


Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride

Author affiliations

Abstract

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.

Graphical abstract: Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride

Back to tab navigation

Publication details

The article was received on 24 Jul 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7TC03309E
Citation: J. Mater. Chem. C, 2017, Advance Article
  •   Request permissions

    Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride

    L. Dai, Y. Zhuang, H. Li, L. Wu, H. Hu, K. Liu, L. Yang and C. Pu, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC03309E

Search articles by author

Spotlight

Advertisements