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    • Keywords


      Amorphous selenium; diamond anvil cell; hydrostatic pressure; crystallization; metallization

    • Abstract


      We report the diamond anvil cell (DAC) high pressure powder X-ray diffraction studies on amorphous selenium (a-Se) under truly hydrostatic pressure condition up to 20 GPa. Amorphous selenium exhibits a sharp and irreversible transition to a hexagonal structure at 10.6 ± 0.1 GPa. It is also known that metallization occurs in a-Se around this pressure. Some plausible arguments are provided to suggest that the amorphous to crystalline transition may be driven by metallization.

    • Author Affiliations


      N V Chandra Shekar1 M Yousuf1 P Ch Sahu1 M Mahendran1 2 K Govinda Rajan1

      1. Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, India
      2. Department of Physics, Anna University, Madras - 600 025, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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