Spin fluctuation dynamics and multiband superconductivity in iron pnictides
نویسندگان
چکیده
منابع مشابه
High-temperature superconductivity in the iron pnictides
In January of this year, a preprint appeared from the group of Hideo Hosono in Japan showing the existence of superconductivity in a layered iron arsenide material with a transition temperature (Tc) of 26 K [1]. The paper grew out of an earlier study that found a Tc of 5 K in the phosphide analogue [2]. In some ways the story looked very similar to what had been found 22 years earlier in the cu...
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The exploration of superconducting iron-free pnictides with a ThCr2Si2-type or related structure and the study of their superconducting properties are important in order to get a deeper understanding of the pairing mechanism of 122 iron pnictides. Here we review the properties of 122-type iron-free pnictides superconductors with structures similar to that of BaFe2As2. Evidence of fully gapped n...
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High-temperature superconductivity in iron pnictides occurs when electrons and holes are doped into their antiferromagnetic parent compounds. Since spin excitations may be responsible for electron pairing and superconductivity, it is important to determine their electron/hole-doping evolution and connection with superconductivity. Here we use inelastic neutron scattering to show that while elec...
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The presence of macroscopic phase separation into superconducting and magnetic phases in LaFeAsO1−xFx and CaFe1−xCoxAsF is demonstrated by muon spin rotation (μSR) measurement across their phase boundaries (x = 0.06 for LaFeAsO1−xFx and x = 0.075–0.15 for CaFe1−xCoxAsF). In LaFeAsO0.94F0.06, both magnetism and superconductivity develop simultaneously below a common critical temperature, Tm ≃ Tc...
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We consider phase transitions and potential coexistence of spin-density-wave SDW magnetic order and extended s-wave s+ superconducting order within a two-band itinerant model of iron pnictides in which SDW magnetism and s+ superconductivity are competing orders. We show that depending on parameters, the transition between these two states is either first order or involves an intermediate phase ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2008
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.78.184509