Universität zu Köln

Chen, Kai, Sundermann, Martin, Strigari, Fabio, Kawabata, Jo, Takabatake, Toshiro ORCID: 0000-0002-3293-8592, Tanaka, Arata ORCID: 0000-0001-8301-8502, Bencok, Peter, Choueikani, Fadi and Severing, Andrea ORCID: 0000-0002-9547-2742 (2018). Tuning the hybridization and magnetic ground state of electron and hole doped CeOs2Al10: An x-ray spectroscopy study. Phys. Rev. B, 97 (15). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Here we present linear and circular polarized soft x-ray absorption spectroscopy (XAS) data at the Ce M-4,M-5 edges of the electron (Ir) and hole-doped (Re) Kondo semiconductor CeOs2Al10. Both substitutions have a strong impact on the unusual high Neel temperature T-N = 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 4 f electrons is related to the amount of f(0) in the ground state and reduction of x-ray magnetic circular dichroism. A relationship of c f-hybridization strength and enhanced T-N is discussed. The direction and doping dependence of the circular dichroism strongly supports the idea of strong Kondo screening along the crystallographic a direction.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Chen, Kai UNSPECIFIED UNSPECIFIED UNSPECIFIED Sundermann, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Strigari, Fabio UNSPECIFIED UNSPECIFIED UNSPECIFIED Kawabata, Jo UNSPECIFIED UNSPECIFIED UNSPECIFIED Takabatake, Toshiro UNSPECIFIED orcid.org/0000-0002-3293-8592 UNSPECIFIED Tanaka, Arata UNSPECIFIED orcid.org/0000-0001-8301-8502 UNSPECIFIED Bencok, Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Choueikani, Fadi UNSPECIFIED UNSPECIFIED UNSPECIFIED Severing, Andrea UNSPECIFIED orcid.org/0000-0002-9547-2742 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-189693
DOI:	10.1103/PhysRevB.97.155106
Journal or Publication Title:	Phys. Rev. B
Volume:	97
Number:	15
Date:	2018
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/18969