High pressure investigations on amorphous selenium |
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| Authors: | N V Chandra Shekar M Yousuf P Ch Sahu M Mahendran K Govinda Rajan |
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| Institution: | (1) Materials Science Division, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India;(2) Department of Physics, Anna University, 600 025 Madras, India |
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| 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. |
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| Keywords: | Amorphous selenium diamond anvil cell hydrostatic pressure crystallization metallization |
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