Low-energy microscopic models for iron-based superconductors: a review
نویسندگان
چکیده
منابع مشابه
S4 Symmetric Microscopic Model for Iron-Based Superconductors
Although iron-based superconductors are multiorbital systems with complicated band structures, we demonstrate that the low-energy physics which is responsible for their high-Tc superconductivity is essentially governed by an effective two-orbital Hamiltonian near half filling. This underlying electronic structure is protected by the S4 symmetry. With repulsive or strong next-nearest-neighbor an...
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We construct the symmetry adapted low energy effective Hamiltonian for the electronic states in the vicinity of the Fermi level in iron based superconductors. We use Luttinger’s method of invariants, expanding about Γ and M points in the Brillouin zone corresponding to two iron unit cell, and then matching the coefficients of the expansion to the 5and 8-band models. We then use the method of in...
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Recent development in the physics of high-temperature superconductivity is reviewed, with special emphasis on the studies of the low-energy excitations of cuprate and iron-based superconductors. For cuprate superconductors, a phenomenology based on coexisting competing orders with superconductivity in the ground state of these doped Mott insulators is shown to provide a consistent account for a...
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Since the discovery of the novel iron-based superconductors, both theoretical and experimental studies have been performed intensively. Because iron-based superconductors have a smaller anisotropy than high-Tc cuprates and a high superconducting transition temperature, there have been a lot of researchers working on the film fabrication of iron-based superconductors and their application. Accor...
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ژورنال
عنوان ژورنال: Reports on Progress in Physics
سال: 2016
ISSN: 0034-4885,1361-6633
DOI: 10.1088/1361-6633/80/1/014503