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Evidence for orbital order and its relation to superconductivity in FeSe0.4Te0.6

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Singh_et_al_2015_Evidence_for_orbital_order_and_its_relation_to_sup_published.pdf (2.379Mb)
Date
16/10/2015
Author
Raj Singh, Udai
White, Seth C.
Schmaus, Stefan
Tsurkan, Vladimir
Loidl, Alois
Deisenhofer, Joachim
Wahl, Peter
Funder
EPSRC
Grant ID
EP/I031014/1
Keywords
Iron-based superconductors
Scanning tunneling microscopy and spectroscopy
Nematicity
Symmetry breaking
Superconductivity
Quasi-particle interference
QC Physics
DAS
Metadata
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Abstract
The emergence of nematic electronic states which break the symmetry of the underlying lattice is a recurring theme in many correlated electron materials, among them the high temperature copper-oxide and iron-based superconductors. Here we provide evidence for the existence of nematic electronic states in the iron chalcogenide superconductor FeSe0.4Te0.6. The symmetry breaking states persist above TC into the normal state. We find an anisotropic coherence length, which is suppressed in a direction perpendicular to the nematic modulations. We interpret the scattering patterns by comparison with quasiparticle interference patterns obtained within a tight-binding model, accounting for orbital ordering.
Citation
Raj Singh , U , White , S C , Schmaus , S , Tsurkan , V , Loidl , A , Deisenhofer , J & Wahl , P 2015 , ' Evidence for orbital order and its relation to superconductivity in FeSe 0.4 Te 0.6 ' , Science Advances , vol. 1 , no. 9 , e1500206 . https://doi.org/10.1126/sciadv.1500206
Publication
Science Advances
Status
Peer reviewed
DOI
https://doi.org/10.1126/sciadv.1500206
ISSN
2375-2548
Type
Journal article
Rights
Copyright © 2015, The Authors. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/), which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/7671

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