Journal Article

FZJ-2018-06918

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lattice dynamics and coupled quadrupole-phonon excitations in CeAuAl 3

Liu, B.-Q. (Corresponding author)MLZ*FZJ* ; Čermák, P.FZJ* ; Franz, C. ; Pfleiderer, C. ; Schneidewind, A.FZJ*

2018
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/20323  doi:10.1103/PhysRevB.98.174306

Abstract: We report first principles calculations of the structural parameters and phonon dispersion of the tetragonalnoncentrosymmetric heavy fermion compound CeAuAl3. Taking into account weak magnetoelastic interactionsof the rare-earth (RE) ions with the spectrum of phonons, we obtain an analytical expression for the hybridizationof quadrupole excitations and phonons from the poles of the one-phonon Green function. In the paramagneticphase, we predict the formation of mixed modes that may be observed by inelastic neutron scattering. Our resultsshow that magnetoelastic interactions, albeit being moderate, play an important role in CeAuAl3. This suggeststhat magnetoelastic interactions may be equally important in a wide range of related compounds.

Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Streumethoden (JCNS-2)
3. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 524 - Controlling Collective States (POF3-524) (POF3-524)
2. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
3. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
4. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2018

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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