Multiband magnetism and superconductivity in Fe-based compounds
By Vladimir Cvetković, Z. Tes̆anović. 2008
186 citations recorded by the source corpus.
Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced, highlighting the crucial role of puckering of As atoms in promoting d electron itinerancy and warding off large local-moment magnetism of Fe ions, the main enemy of superconductivity. Quantum many-particle effects in charge, spin and multiband channels are explored and a nesting-induced spin density-wave order is found in the parent compund. We argue that this largely itinerant antiferromagnetism and high Tc itself are essentially tied to the multiband nature of the Fermi surface.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/3634719a30a18bc66f9645faeb24c3d5fb5123cf
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Angle-resolved photoemission studies of quantum materials (2020, unknown): “24(c) shows the representative low-energy band dispersions along high symmetry momenta, with the t2g orbital contents most dominant (Cvetkovic and Tesanovic, 2009; Lebegue, 2007; Lu et al., 2008; Singh, 2008).”
- Superconductivity in iron compounds (2011, background): “Together with nesting on the Fermi surface, these Fe bands can lead to magnetic ordering (Cao, Hirschfeld, and Cheng, 2008; J. Dong et al., 2008; Cvetkovic and Tesanovic, 2009; Singh, 2009) as discussed in Sec.”
- High-temperature superconductivity in iron-based materials (2010, background): “Theoretically, these concerns can be taken into account in an itinerant scenario by considering details of the multi-band structure [71,72], with the non-trivial band folding and metallic nature of the FeSCs likely a result of partial gapping of the FS.”