Kavli Affiliate: Jeffrey McMahon
| First 5 Authors: Jeffrey M. McMahon, David M. Ceperley, , ,
| Summary:
Superconductivity in the recently proposed ground-state structures of atomic metallic hydrogen is investigated over the pressure range 500 GPa to 3.5 TPa. Near molecular dissociation, the electron–phonon coupling $λ$ and renormalized Coulomb repulsion are similar to the molecular phase. A continuous increase in the critical temperature $T_c$ with pressure is therefore expected, to $jmmapprox 356$K near 500 GPa. As the atomic phase stabilizes with increasing pressure, $λ$ increases, causing $T_c$ to approach $jmmapprox 481$K near 700 GPa. At the first atomic–atomic structural phase transformation ($jmmapprox 1$ — 1.5 TPa), a discontinuous jump in $λ$ occurs, causing a significant increase in $T_c$ of up to 764K.
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