Lattice dynamics, crystal-field excitations, and quadrupolar fluctuations of YbRu2Ge2

Article

关键词: ELECTRONIC RAMAN-SCATTERING;    TEMPERATURE-DEPENDENCE;    ELECTRICAL-RESISTIVITY;    MAGNETIC-PROPERTIES;    ORDER;   

DOI  :  10.1103/PhysRevB.99.235104

来源: SCIE

【 摘 要 】

We employ polarization-resolved Raman scattering spectroscopy to study ferroquadrupolar (FQ) fluctuations and crystal-field (CF) excitations in the YbRu2Ge2 heavy-fermion metal with FQ transition at T-Q = 10 K. We demonstrate that the electronic static Raman susceptibilities in quadrupolar symmetry channels exhibit nearly Curie law behavior and that the electron-lattice coupling is essential for the FQ transition at T-Q. We establish the CF level scheme of the Yb3+ ground state F-2(7/2) multiplet. We study the lattice dynamics and demonstrate coupling between CF transitions and phonon modes.

【 授权许可】

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