High-pressure optical studies on sulfur to 121 GPa: Optical evidence for metallization

Academic Article


  • The pressure dependence of the optical absorption edge to 78 GPa and the reflectivity to 121 GPa were measured in sulfur from 0.5 to 3.5 eV in a diamond anvil cell. Our optical results show no evidence of metallic behavior below 95 GPa. A discontinuous change in absorption was observed at 23 GPa. The absorption edge is about 1 eV at 50 GPa, the pressure at which poor metalliclike behavior of sulfur was suggested earlier based on the measurement of the temperature dependence of the electrical resistance. At 95 GPa the reflectivity has a sudden increase and reaches 62% in the infrared range at the sample-diamond interface at 121 GPa. We attribute this to pressure-induced metallization. © 1991 The American Physical Society.
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    Author List

  • Luo H; Desgreniers S; Vohra YK; Ruoff AL
  • Start Page

  • 2998
  • End Page

  • 3001
  • Volume

  • 67
  • Issue

  • 21