Comment on “Melting Line of Hydrogen at High Pressures”

A Comment on the Letter by Shanti Deemyad and Isaac F. Silvera, Phys. Rev. Lett. 100, 155701 (2008). The authors of the Letter offer a Reply.

Figure 1

(a) Melting curve of ${\mathrm{H}}_2$. Open circles and thick solid line are from Ref. 1. All other symbols are data and Ketchin fits from Refs. 2, 3. The arrows show $P\mathrm{\text{−}}T$ paths taken in Ref. 2. (b) ${\mathrm{H}}_2$ vibrons on both sides of the melting maximum proposed in Ref. 1.