Evidence for orbital order and its relation to superconductivity in FeSe(0.4)Te(0.6)

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...

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Detalles Bibliográficos
Autores principales: Singh, Udai R., White, Seth C., Schmaus, Stefan, Tsurkan, Vladimir, Loidl, Alois, Deisenhofer, Joachim, Wahl, Peter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2015
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4646791/
https://www.ncbi.nlm.nih.gov/pubmed/26601277
http://dx.doi.org/10.1126/sciadv.1500206
Descripción
Sumario: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 FeSe(0.4)Te(0.6) 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.

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