Universität zu Köln

Amorese, Andrea ORCID: 0000-0003-0271-0543, Kummer, Kurt, Brookes, Nicholas B., Stockert, Oliver, Adroja, Devashibhai T., Strydom, Andre M., Sidorenko, Andrey, Winkler, Hannes, Zocco, Diego A., Prokofiev, Andrey, Paschen, Silke ORCID: 0000-0002-3796-0713, Haverkort, Maurits W. ORCID: 0000-0002-7216-3146, Tjeng, Liu Hao ORCID: 0000-0002-0595-9312 and Severing, Andrea ORCID: 0000-0002-9547-2742 (2018). Determining the local low-energy excitations in the Kondo semimetal CeRu4Sn6 using resonant inelastic x-ray scattering. Phys. Rev. B, 98 (8). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We have investigated the local low-energy excitations in CeRu4Sn6, a material discussed recently in the framework of strongly correlated Weyl semimetals, by means of Ce M-5 resonant inelastic x-ray scattering (RIXS). The availability of both F-2(5/2) and F-2(7/2) excitations of the Ce 4f(1) configuration in the spectra allows for the determination of the crystal-electric field (CEF) parameters that explain quantitatively the high-temperature anisotropy of the magnetic susceptibility. The absence of an azimuthal dependence in the spectra indicates that all CEF states are close to being rotational symmetric. We show further that the non-negligible impact of the (sic)(6)(0) parameter on the ground state of CeRu4Sn6 leads to a reduction of the magnetic moment mu(c) due to multiplet intermixing. This improves the agreement between CEF calculations and the experimentally determined magnetic susceptibility considerably at low temperatures. Deviations that persist at low temperatures for fields within the tetragonal plane are attributed to the Kondo interaction between 4f and conduction electrons. The RIXS results are consistent with inelastic neutron scattering data and are compared to the predictions from ab initio based electronic structure calculations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Amorese, Andrea UNSPECIFIED orcid.org/0000-0003-0271-0543 UNSPECIFIED Kummer, Kurt UNSPECIFIED UNSPECIFIED UNSPECIFIED Brookes, Nicholas B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stockert, Oliver UNSPECIFIED UNSPECIFIED UNSPECIFIED Adroja, Devashibhai T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Strydom, Andre M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sidorenko, Andrey UNSPECIFIED UNSPECIFIED UNSPECIFIED Winkler, Hannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Zocco, Diego A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prokofiev, Andrey UNSPECIFIED UNSPECIFIED UNSPECIFIED Paschen, Silke UNSPECIFIED orcid.org/0000-0002-3796-0713 UNSPECIFIED Haverkort, Maurits W. UNSPECIFIED orcid.org/0000-0002-7216-3146 UNSPECIFIED Tjeng, Liu Hao UNSPECIFIED orcid.org/0000-0002-0595-9312 UNSPECIFIED Severing, Andrea UNSPECIFIED orcid.org/0000-0002-9547-2742 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-176020
DOI:	10.1103/PhysRevB.98.081116
Journal or Publication Title:	Phys. Rev. B
Volume:	98
Number:	8
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 SPECTROSCOPY Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17602