%0 Journal Article
%A Portnichenko, P. Y.
%A Akbari, A.
%A Nikitin, S. E.
%A Cameron, A. S.
%A Dukhnenko, A. V.
%A Filipov, V. B.
%A Shitsevalova, N. Yu.
%A Čermák, P.
%A Radelytskyi, I.
%A Schneidewind, A.
%A Ollivier, J.
%A Podlesnyak, A.
%A Huesges, Z.
%A Xu, J.
%A Ivanov, A.
%A Sidis, Y.
%A Petit, S.
%A Mignot, J.-M.
%A Thalmeier, P.
%A Inosov, D. S.
%T Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6
%J Physical review / X Expanding access X
%V 10
%N 2
%@ 2160-3308
%C College Park, Md.
%I APS
%M FZJ-2020-01755
%P 021010
%D 2020
%X In contrast to magnetic order formed by electrons’ dipolar moments, ordering phenomena associated with higher-order multipoles (quadrupoles, octupoles, etc.) are more difficult to characterize because of the limited choice of experimental probes that can distinguish different multipolar moments. The heavy-fermion compound CeB6 and its La-diluted alloys are among the best-studied realizations of the long-range-ordered multipolar phases, often referred to as “hidden order.” Previously, the hidden order in phase II was identified as primary antiferroquadrupolar and field-induced octupolar order. Here, we present a combined experimental and theoretical investigation of collective excitations in phase II of CeB6. Inelastic neutron scattering (INS) in fields up to 16.5 T reveals a new high-energy mode above 14 T in addition to the low-energy magnetic excitations. The experimental dependence of their energy on the magnitude and angle of the applied magnetic field is compared to the results of a multipolar interaction model. The magnetic excitation spectrum in a rotating field is calculated within a localized approach using the pseudospin representation for the Γ8 states. We show that the rotating-field technique at fixed momentum can complement conventional INS measurements of the dispersion at a constant field and holds great promise for identifying the symmetry of multipolar order parameters and the details of intermultipolar interactions that stabilize hidden-order phases.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000525447300001
%R 10.1103/PhysRevX.10.021010
%U https://juser.fz-juelich.de/record/874993