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Evolution of ground-state wave function in CeCoIn5 upon Cd or Sn doping

MPG-Autoren
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Sundermann,  M.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Hu,  Z.
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Wirth,  S.
Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Severing,  A.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Chen, K., Strigari, F., Sundermann, M., Hu, Z., Fisk, Z., Bauer, E. D., et al. (2018). Evolution of ground-state wave function in CeCoIn5 upon Cd or Sn doping. Physical Review B, 97(4): 045134, pp. 1-6. doi:10.1103/PhysRevB.97.045134.


Zitierlink: https://hdl.handle.net/21.11116/0000-0000-642A-1
Zusammenfassung
We present linear polarization-dependent soft-x-ray absorption spectroscopy data at the Ce M-4,M-5 edges of Cd- and Sn-dopedCeCoIn(5). The(4)f ground-state wave functions have been determined for their superconducting, anti-ferromagnetic, and paramagnetic ground states. The absence of changes in the wave functions in CeCo(In1-x Cd-x)(5) suggests that the 4f-conduction-electron (cf) hybridization is not affected by global Cd doping, thus supporting the interpretation of magnetic droplets nucleating long-range magnetic order. This is contrasted by changes in the wave function due to Sn substitution. Increasing Sn in CeCo(In1-y Sn-y)(5) compresses the 4f orbitals into the tetragonal plane of these materials, suggesting enhanced cf hybridization with the in-plane In(1) atoms and a homogeneous altering of the electronic structure. As these experiments show, the 4f wave functions are a very sensitive probe of small changes in the hybridization of 4f and conduction electrons, even conveying information about direction dependencies.