Exploration of Excitations in Cerium Hafnate Pyrochlore Oxide.
A theoretically predicted Octupolar QSI was found in the Ce2Sn2O7 pyrochlore oxide. The dipole-octupole nature of the ground state doublet explains remarkably well macroscopic measurements. Furthermore, the octupolar nature of the correlations has been observed, taking the shape of a broad hump located at high momentum transfer in neutron diffraction patterns. Unfortunately, the chemistry of Ce2Sn2O7 makes it challenging to grow single crystals to further elucidate the nature of its ground state. However, it is possible for its parent compound, Ce2Hf2O7. Its chemical and physical similarities with Ce2Sn2O7 motivate its investigation as it could withstand undoubtable fingerprints of this Octupolar QSI. We propose to explore the low-lying continuum of excitations present in Ce2Hf2O7 and to track their evolution when entering the correlated regime as well as under the application of a magnetic field.
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Romain Sibille; FENNELL Tom; LHOTEL Elsa; OLLIVIER Jacques; PETIT Sylvain and POREE Victor. (2021). Exploration of Excitations in Cerium Hafnate Pyrochlore Oxide.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-813
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