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Comment on “Insulator-metal transition in dense fluid deuterium”

Desjarlais, Michael P.; Knudson, Marcus D.; Redmer, Ronald

Celliers et al. (Reports, 17 August 2018, p. 677), in an attempt to reconcile differences in inferred metallization pressures, provide an alternative temperature analysis of the Knudson et al. experiments (Reports, 26 June 2015, p. 1455). We show here that this reanalysis implies an anomalously low specific heat for the metallic fluid that is clearly inconsistent with first-principles calculations.