Probing the Ground State Properties of Iron-based Superconducting Pnictides and Related Systems by Muon-Spin Spectroscopy

Abstract

In this short review, we attempt to give a comprehensive discussion of studies performed to date by muon-spin spectroscopy (more precisely the relaxation and rotation technique, also know as \muSR technique) on the recently discovered layered iron-based superconductors. On one side, \muSR has been used to characterized the magnetic state of different families of layered iron-based systems. Similarly the subtle interplay of the magnetic state and the structural transition present in some families has been investigated. We will also discuss the information provided by this technique on the interaction between the magnetic state and the superconducting phase. Finally the \muSR technique has been used to investigate the magnetic penetration depth of the superconducting ground state. The study of its absolute value, temperature and magnetic field dependence provides crucial tests for investigating possible unconventional superconducting states in such systems.

10 pages, 5 figures. Physica C Special Edition on Superconducting Pnictides. Version 2: Fig. 3 modified due to data corrections in Ref. 6, typos corrected

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• Universal observation of multiple order parameters in cuprate superconductors
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• Magnetic order in CaFe1-xCoxAsF (x = 0, 0.06, 0.12) superconductor compounds
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• Enhancement of Superfluid Stiffness, Suppression of Superconducting T_c and Field-induced Magnetism in the Pnictide Superconductor LiFeAs
• Heat capacity measurements on FeAs-based compounds: a thermodynamic probe of electronic and magnetic states
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• Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation
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Cited by in corpus (11)

• Gap symmetry and structure of Fe-based superconductors
• Anisotropic superconducting properties of single-crystalline FeSe0.5Te0.5
• Evolution of two-gap behavior of the superconductor FeSe_1-x
• Magnetic-superconducting phase boundary of SmFeAsO${}_{1-x}$F${}_x$ studied via muon spin rotation: Unified behavior in a pnictide family
• The phase diagrams of iron-based superconductors: theory and experiments
• Coexistence of low moment magnetism and superconductivity in tetragonal FeS and suppression of $T_{\mathrm{c}}$ under pressure
• Nanoscopic coexistence of magnetic and superconducting states within the FeAs layers of CeFeAsO1-xFx
• Long- to short-range magnetic order in fluorine-doped CeFeAsO
• Microscopic Study of the Superconducting State of the Iron Pnictide RbFe_2As_2
• Science Case for the new High-Intensity Muon Beams HIMB at PSI
• Superfluid density and superconducting gaps of RbFe_{2}As_{2} as a function of hydrostatic pressure