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Tuning the hybridization and magnetic ground state of electron and hole doped CeOs2Al10 : An x-ray spectroscopy study

DOI: 10.1103/PhysRevB.97.155106 DOI Help

Authors: Kai Chen (University of Cologne) , Martin Sundermann (University of Cologne; Max Planck Institute for Chemical Physics of Solids) , Fabio Strigari (University of Cologne) , Jo Kawabata (Hiroshima University) , Toshiro Takabatake (Hiroshima University) , Arata Tanaka (Hiroshima University) , Peter Bencok (Diamond Light Source) , Fadi Choueikani (Synchrotron SOLEIL) , Andrea Severing (University of Cologne; Max Planck Institute for Chemical Physics of Solids)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 97

State: Published (Approved)
Published: April 2018
Diamond Proposal Number(s): 11558

Abstract: Here we present linear and circular polarized soft x-ray absorption spectroscopy (XAS) data at the Ce M4,5 edges of the electron (Ir) and hole-doped (Re) Kondo semiconductor CeOs2Al10. Both substitutions have a strong impact on the unusual high NĂ©el temperature TN=28.5 K, and also the direction of the ordered moment in case of Ir. The substitution dependence of the linear dichroism is weak thus validating the crystal-field description of CeOs2Al10 being representative for the Re and Ir substituted compounds. The impact of electron and hole doping on the hybridization between conduction and 4f electrons is related to the amount of f0 in the ground state and reduction of x-ray magnetic circular dichroism. A relationship of cf-hybridization strength and enhanced TN is discussed. The direction and doping dependence of the circular dichroism strongly supports the idea of strong Kondo screening along the crystallographic a direction.

Journal Keywords: Electronic structure; Kondo effect; X-ray absorption spectroscopy

Subject Areas: Materials, Physics

Instruments: I10-Beamline for Advanced Dichroism

Other Facilities: Synchrotron-Soleil

Added On: 11/04/2018 11:49

Discipline Tags:

Materials Science Physics Hard condensed matter - structures Magnetism

Technical Tags:

Spectroscopy Linear Dichroism (LD) X-ray Magnetic Linear Dichroism (XMLD)