Melting Line of Hydrogen at High Pressures

Shanti Deemyad and Isaac F. Silvera
Phys. Rev. Lett. 100, 155701 – Published 14 April 2008

Abstract

The insulator to metal transition in solid hydrogen was predicted over 70 years ago but the demonstration of this transition remains a scientific challenge. In this regard, a peak in the temperature versus pressure melting line of hydrogen may be a possible precursor for metallization. However, previous measurements of the fusion curve of hydrogen have been limited in pressure and temperature by diffusion of hydrogen into the gasket or diamonds. To overcome this limitation we have used an innovative technique of pulsed laser heating of the sample and find a peak in the melting line at P=64.7±4GPa and T=1055±20K.

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  • Received 24 January 2008

DOI:https://doi.org/10.1103/PhysRevLett.100.155701

©2008 American Physical Society

Authors & Affiliations

Shanti Deemyad and Isaac F. Silvera

  • Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

Comments & Replies

Deemyad and Silvera Reply:

Shanti Deemyad and Isaac F. Silvera
Phys. Rev. Lett. 102, 149602 (2009)

Comment on “Melting Line of Hydrogen at High Pressures”

Alexander Goncharov, Russell J. Hemley, and E. Gregoryanz
Phys. Rev. Lett. 102, 149601 (2009)

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Vol. 100, Iss. 15 — 18 April 2008

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