Physics – Condensed Matter – Superconductivity
Scientific paper
2001-10-15
Phys. Rev. B, Rapid. Comm., 65, 100511(R), 2002.
Physics
Condensed Matter
Superconductivity
4 pages, revtex, 3 figs embedded
Scientific paper
10.1103/PhysRevB.65.100511
The recent discovery of superconductivity in hexagonal iron under pressure poses a question about whether it is of conventional (phonon) or unconventional (magnetic?) origin. We present first-principles calculations of the electron-phonon coupling in iron at $P\agt 15$ GPa, and argue that a conventional mechanism can explain the appearance of superconductivity, but not its rapid disappearance at $P\agt 30$ GPa. We suggest that spin fluctuations, ferro- and/or antiferromagnetic, play a crucial role in superconductivity in this case.
Mazin Igor I.
Mehl Michael J.
Papaconstantopoulos Dimitrios A.
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