This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1088/1361-648X/aaa1aa in citations.
Intermediate-valence state of the Sm and Eu in SmB$_{6}$ and EuCu$_{2}$Si$_{2}$ : neutron spectroscopy data and analysis
Intermediate-valence state of the Sm and Eu in SmB$_{6}$ and EuCu$_{2}$Si$_{2}$ : neutron spectroscopy data and analysis
Magnetic neutron scattering data for Sm (SmB6, Sm(Y)S) and Eu (EuCu2Si2−x Ge x ) intermediate-valence compounds have been analysed in terms of a generalized model of the intermediate-radius exciton. Special attention is paid to the correlation between the average ion's valence and parameters of...
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Personal Name(s): | Savchenkov, P. S. (Corresponding author) |
---|---|
Alekseev, P. A. / Podlesnyak, A. / Kolesnikov, A. I. / Nemkovski, K. S. | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Journal of physics / Condensed matter, 30 (2018) 5, S. 055801 - |
Imprint: |
Bristol
IOP Publ.
2018
|
DOI: |
10.1088/1361-648X/aaa1aa |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States |
Subject (ZB): | |
Publikationsportal JuSER |
Magnetic neutron scattering data for Sm (SmB6, Sm(Y)S) and Eu (EuCu2Si2−x Ge x ) intermediate-valence compounds have been analysed in terms of a generalized model of the intermediate-radius exciton. Special attention is paid to the correlation between the average ion's valence and parameters of the low-energy excitation in the neutron spectra, such as the resonance mode, including its magnetic form factor. Along with specific features of the formation of the intermediate-valence state for Sm and Eu ions, common physical mechanisms have been revealed for systems based on these elements from the middle of the rare-earth series. A consistent description of the existing experimental data has been obtained by using the concept of a loosely bound hole for the Eu f-electron shell in the intermediate-valence state, in analogy with the previously established loosely bound electron model for the Sm ion. |