Macroscopic Quantum System, Highly Correlated Electron State, and High-Temperature 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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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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High-transition-temperature superconductivity discovered recently in iron pnictides is analyzed within a perturbation theory. Specifically, the probable pairing symmetry, the doping dependence of the transition temperature and a pairing mechanism etc. are studied by solving the Eliashberg equation for many-band(2and 5-band) Hubbard models with realistic electronic structures. The effective pair...
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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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The surprising discovery of superconductivity in layered iron-based materials, with transition temperatures climbing as high as 55K, has led to thousands of publications on this subject over the past two years. Although there is general consensus on the unconventional nature of the Cooper pairing state of these systems, several central questions remain — including the role of magnetism, the nat...
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ژورنال
عنوان ژورنال: Journal of Modern Physics
سال: 2014
ISSN: 2153-1196,2153-120X
DOI: 10.4236/jmp.2014.57063