Role of the orbital degree of freedom in iron-based superconductors
By M. Yi, Yan Zhang, Zhi-xun Shen, D. Lu. 2017
194 citations recorded by the source corpus.
Almost a decade has passed since the serendipitous discovery of the iron-based high temperature superconductors (FeSCs) in 2008. The fact that, as in the copper oxide high temperature superconductors, long-range antiferromagnetism in the FeSCs arises in proximity to superconductivity immediately raised the question of the degree of similarity between the two. Despite the great resemblance in their phase diagrams, there exist important differences between the FeSCs and the cuprates that need to be considered in order to paint a full picture of these two families of high temperature superconductors. One of the key differences is the multi-orbital multi-band nature of the FeSCs, which contrasts with the effective single-band nature of the cuprates. Systematic studies of orbital related phenomena in FeSCs have been largely lacking. In this review, we summarize angle-resolved photoemission spectroscopy (ARPES) measurements across various FeSC families that have been reported in literature, focusing on the systematic trends of orbital dependent electron correlations and the role of different Fe 3d orbitals in driving the nematic transition, the spin-density-wave transition, and superconductivity.
Subfields: Accounting, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/2f98306af771a8c96b83bfce3bf0fa1a496fbb32
Citations in the corpus
- Angle-resolved photoemission studies of quantum materials (2020, unknown): “Here it should be emphasized that the C2 symmetry from the nematic phase and the orbital dependence are evident in the SDW gap anisotropy: it is often the largest on dxy crossings, followed by dyz and dxz segments (Richard et al., 2010; Yi et al., 2014, 2017).”
- Flat bands, strange metals and the Kondo effect (2023, unknown): “The combination of topological flat and wide bands near the Fermi energy allows for the construction of exponentially localized and symmetry-preserving Kramers-doublet Wannier orbitals.”