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Progress in the Search for Metallic Hydrogen: 342 GPa

Published online by Cambridge University Press:  10 February 2011

Chandrabhas Narayna ,
Jon Orloff  and
Arthur L. Ruoff
Chandrabhas Narayna
Affiliation:
Dept. of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, ruoff@msc.Coraell.edu
Jon Orloff
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, MD 20742–3511
Arthur L. Ruoff
Affiliation:
Dept. of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, ruoff@msc.Coraell.edu
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Abstract

The experimental search for metallic hydrogen has been active for over two decades with the first claims being published in 1975, followed by several others all of which failed to pass the test of time. The present paper describes experiments in which several important changes were made in the experiment, compared to those performed previously, which enabled us to reach a pressure of 342 GPa. The path was strewn with 15 pairs of carefully chosen diamonds. At 342 GPa visible light was readily transmitted through the sample proving that it was not yet an alkali metal. The reasons why it has been so difficult to achieve the required pressure for metallization will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 499: Symposium DD – High Pressure Materials Research , 1997 , 341
Copyright
Copyright © Materials Research Society 1998

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