Using electron irradiation to probe iron-based superconductors

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2018-05-14
Authors
Cho, Kyuil
Kończykowski, M.
Teknowijoyo, S.
Tanatar, Makariy
Prozorov, Ruslan
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Ames National LaboratoryPhysics and Astronomy
Abstract

High-energy electron irradiation at low temperatures is an efficient and controlled way to create vacancy–interstitial Frenkel pairs in a crystal lattice, thereby inducing nonmagnetic point-like scattering centers. In combination with London penetration depth and resistivity measurements, the electron irradiation was used as a phase-sensitive probe to study the superconducting order parameter in iron-based superconductors (FeSCs), lending strong support to sign-changing s ± pairing. Here, we review the key results of the effect of electron irradiation in FeSCs.

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