Using electron irradiation to probe iron - based superconductors

Abstract

High energy electron irradiation is an efficient way to create vacancy-interstitial Frenkel pairs in crystal lattice, thereby inducing controlled non-magnetic point - like scattering centers. In combination with London penetration depth and resistivity measurements, the irradiation was particularly useful as a phase - sensitive probe of the superconducting order parameter in iron - based superconductors lending strongest support to sign - changing $s_{\pm }$ pairing. Here we review the key results on the effect of electron irradiation in iron-based superconductors.

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• Comparative study of the effects of electron irradiation and natural disorder in single crystals of SrFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ ($x=$0.35) superconductor
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• Ab-initio perspective on structural and electronic properties of iron-based superconductors
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• Nodal superconductivity in isovalently substituted SrFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ pnictide superconductor at the optimal doping, $x=$0.35
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• Antiferromagnetism in Iron-Based Superconductors: Selection of Magnetic Order and Quasiparticle Interference
• Effect of heavy-ion irradiation on London penetration depth in over-doped Ba(Fe,Co)2As2
• Electronic Phase Diagram of SrFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$: Effect of Structural Dimensionality
• Effect of proton irradiation on the normal state low-energy excitations of Ba(Fe${}_{1-x}$Rh${}_x$)${}_2$As${}_2$ superconductors
• Mössbauer studies of the peculiar magnetism in parent compounds of the iron-based superconductors

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• Ironing out the details of unconventional superconductivity
• Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe2
• Emerging superconductivity with broken time reversal symmetry inside a superconducting $s$-wave state
• Electron irradiation effects on superconductivity in PdTe${}_2$: an application of a generalized Anderson theorem
• Analysis of the London penetration depth in Ni-doped CaKFe4As4
• Tuning the Parity Mixing of Singlet-Septet Pairing in a Half-Heusler Superconductor
• Evidence for s-wave Pairing with Atomic Scale Disorder in the van der Waals Superconductor NaSn2As2
• Interplay between superconductivity and itinerant magnetism in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ ($x=$ 0.2) probed by the response to controlled point-like disorder
• Multi-band $s_{++}$ superconductivity in ${\text{V}}_3\text{Si}$ determined from the response to a controlled disorder
• Charge density wave and superconductivity competition in Lu${}_5$Ir${}_4$Si${}_{10}$ : a proton irradiation study
• Anisotropic superconductivity of niobium based on its response to non-magnetic disorder
• Ingredients for Generalized Models of $\kappa$-Phase Organic Charge-Transfer Salts: A Review
• Defect-Induced Low-Energy Majorana Excitations in the Kitaev Magnet $\alpha$-RuCl${}_3$
• Possible unconventional pairing in $(\text{Ca,Sr}{)}_3(\text{Ir,Rh}{)}_4{\text{Sn}}_{13}$ superconductors revealed by controlling disorder
• Electron irradiation reveals robust fully gapped superconductivity in LaNiGa${}_2$
• Experimental investigation of electronic interactions in collapsed and uncollapsed LaFe2As2 phases
• Response of the Verwey transition in magnetite to a controlled point-like disorder induced by 2.5 MeV electron irradiation
• Effect of controlled artificial disorder on the magnetic properties of EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ ferromagnetic superconductor
• Slope of the upper critical field at $T_c$ in two-band superconductors with non-magnetic disorder: $s_{++}$ superconductivity in ${\text{Ba}}_{1-x}{\text{K}}_x{\text{Fe}}_2{\text{As}}_2$
• Anisotropic multiband superconductivity in 2M-WS${}_2$ probed by controlled disorder
• Enhancement of the Curie temperature in single crystalline ferromagnetic LaCrGe${}_3$ by electron irradiation-induced disorder
• Ion-selective scattering studied by the variable-energy electron irradiation of Ba${}_{0.2}$K${}_{0.8}$Fe${}_2$As${}_2$ superconductor
• Effect of controlled point-like disorder induced by 2.5 MeV electron irradiation on nematic resistivity anisotropy of hole-doped (Ba,K)Fe${}_2$As${}_2$