Interplay of hidden orbital order and superconductivity in CeCoIn5
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Published:2023-05-24
Issue:1
Volume:14
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Chen WeijiongORCID, Neerup Breiø Clara, Massee Freek, Allan Milan P.ORCID, Petrovic CedomirORCID, Davis J. C. SéamusORCID, Hirschfeld Peter J., Andersen Brian M., Kreisel AndreasORCID
Abstract
AbstractVisualizing atomic-orbital degrees of freedom is a frontier challenge in scanned microscopy. Some types of orbital order are virtually imperceptible to normal scattering techniques because they do not reduce the overall crystal lattice symmetry. A good example is dxz/dyz (π,π) orbital order in tetragonal lattices. For enhanced detectability, here we consider the quasiparticle scattering interference (QPI) signature of such (π,π) orbital order in both normal and superconducting phases. The theory reveals that sublattice-specific QPI signatures generated by the orbital order should emerge strongly in the superconducting phase. Sublattice-resolved QPI visualization in superconducting CeCoIn5 then reveals two orthogonal QPI patterns at lattice-substitutional impurity atoms. We analyze the energy dependence of these two orthogonal QPI patterns and find the intensity peaked near E = 0, as predicted when such (π,π) orbital order is intertwined with d-wave superconductivity. Sublattice-resolved superconductive QPI techniques thus represent a new approach for study of hidden orbital order.
Funder
Royal Society Danish National Committee for Research Infrastructure (NUFI): ESS-Lighthouse Q-MAT DOE | SC | Basic Energy Sciences DOE | Advanced Research Projects Agency - Energy
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
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