Superconductivity in compressed iron: Role of spin fluctuations

I. I. Mazin; D. A. Papaconstantopoulos; M. J. Mehl

doi:10.1103/PhysRevB.65.100511

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Superconductivity in compressed iron: Role of spin fluctuations

I. I. Mazin, D. A. Papaconstantopoulos, M. J. Mehl

DOI 10.1103/PhysRevB.65.100511 · Physical Review B

T1

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Abstract

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≳15 GPa, and argue that a conventional mechanism can explain the appearance of superconductivity, but not its rapid disappearance at P≳30 GPa. We suggest that spin fluctuations, ferro- and/or antiferromagnetic, play a crucial role in superconductivity in this case.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2	79 GPa	unknown
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.4	48 GPa	unknown
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0	12 GPa	unknown
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2	15 GPa	onset