Evidence for orbital order and its relation to superconductivity in FeSe0.4Te0.6.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26601277.
- Also identified by DOI 10.1126/sciadv.1500206 and PMC identifier 4646791.
- Licence recorded as CC BY-NC.
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Abstract
The emergence of nematic electronic states accompanied by a structural phase transition is a recurring theme in many correlated electron materials, including the high-temperature copper oxide- and iron-based superconductors. We provide evidence for nematic electronic states in the iron-chalcogenide superconductor FeSe0.4Te0.6 from quasi-particle scattering detected in spectroscopic maps. The symmetry-breaking states persist above T c into the normal state. We interpret the scattering patterns by comparison with quasi-particle interference patterns obtained from a tight-binding model, accounting for orbital ordering. The relation to superconductivity and the influence on the coherence length are discussed.