Study of the charcter of the crystal field excitation in CeAuAl3 at the magnetic zone center and teh anti-crossing region
Hybridized excitations that comprise of well-known and well-understood collective modes have received increasing interest as the possible origin of novel functionalities and unconventional materials properties. In materials with strong electronic correlations, the effects of electron-phonon interactions are typically neglected, being deemed not important for the overall understanding. In CeAuAl3 th coupling of crystal field (CEF) and phonons was observed by TAS(see PNAS 116 6695 (2019)), together with an anti-crossing along the c-direction of the TA phonon and the CEF. In a first experiment we studied their character with polirized neutrons, and found an unextected nuclear component of the CEF away from the anti-crossing Q-region. For better understanding of the magnetoelastic hybridization, we propose a to verify and extend this observation. We ask for measuring the q-dependence of the nuclear and magnetic contribution of the CEF around different Gamma-points for energies (2.5...7)meV in the paramagnetic state of CeAuAl3 with full polarization analysis.
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Astrid Schneidewind; BEAUVOIS Ketty; CERMAK Petr; ENDERLE Mechthild; FRANZ Christian and STEKIEL Michal. (2021). Study of the charcter of the crystal field excitation in CeAuAl3 at the magnetic zone center and teh anti-crossing region. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-04-510
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