Interplay of hidden orbital order and superconductivity in CeCoIn5

Chen, Weijiong; Neerup Breiø, Clara; Massee, Freek; Allan, Milan P.; Petrovic, ‪Cedomir; Davis, J. C. Séamus; Hirschfeld, Peter J.; Andersen, Brian M.; Kreisel, Andreas

doi:10.1038/s41467-023-38760-7

Title: Interplay of hidden orbital order and superconductivity in CeCoIn5

Journal Article · 23 May 2023 · Nature Communications

DOI: https://doi.org/10.1038/s41467-023-38760-7 · OSTI ID:1975147

; Neerup Breiø, Clara; Massee, Freek;

;

; Hirschfeld, Peter J.; Andersen, Brian M.;

Abstract Visualizing 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 d _xz / d _yz (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 CeCoIn ₅ 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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; SC0012704

OSTI ID:: 1975147

Alternate ID(s):: OSTI ID: 1992859

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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