Ground State Structure of the Metallic Hydrogen
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Abstract
By using Heine-Abarencov pseudopotential method with mono-parameter rc , the expressions for ground state energy ε(rs ) , pressure P (rs), and bulk modulus B(rs) of metallic hydrogen (fcc, bcc, and hcp structures) are derived. Based on Gibbs free energy function criterion, the calculation shows that cold metallic hydrogen lattice (T = 0K) belongs to hcp structure. -