Superconductivity in SnO: a Nonmagnetic Analog to Fe-based Superconductors?

Abstract

We found that under pressure SnO with alpha-PbO structure, the same structure as in many Fe-based superconductors, e.g. beta-FeSe, undergoes a transition to a superconducting state for p > 6 GPa with a maximum Tc of 1.4 K at p = 9.3 GPa. The pressure dependence of Tc reveals a dome-like shape and superconductivity disappears for p > 16 GPa. It is further shown from band structure calculations that SnO under pressure exhibits a Fermi surface topology similar to that reported for some Fe-based superconductors and that the nesting between the hole and electron pockets correlates with the change of Tc as a function of pressure.

4 pages, 6 figures, as accepted by Phys. Rev. Lett. (in press)

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• First Principles Study of SnO Under High Pressure
• High pressure transport studies of the LiFeAs analogues CuFeTe2 and Fe2As
• Nature of the electronic states involved in the chemical bonding and superconductivity at high pressure in SnO
• Emergent superconductivity in doped ferroelectric hafnia