TY  - JOUR
AU  - Portnichenko, P. Y.
AU  - Akbari, A.
AU  - Nikitin, S. E.
AU  - Cameron, A. S.
AU  - Dukhnenko, A. V.
AU  - Filipov, V. B.
AU  - Shitsevalova, N. Yu.
AU  - Čermák, P.
AU  - Radelytskyi, I.
AU  - Schneidewind, A.
AU  - Ollivier, J.
AU  - Podlesnyak, A.
AU  - Huesges, Z.
AU  - Xu, J.
AU  - Ivanov, A.
AU  - Sidis, Y.
AU  - Petit, S.
AU  - Mignot, J.-M.
AU  - Thalmeier, P.
AU  - Inosov, D. S.
TI  - Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6
JO  - Physical review / X Expanding access X
VL  - 10
IS  - 2
SN  - 2160-3308
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2020-01755
SP  - 021010
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000525447300001
DO  - DOI:10.1103/PhysRevX.10.021010
UR  - https://juser.fz-juelich.de/record/874993
ER  -