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000874993 1001_ $$0P:(DE-HGF)0$$aPortnichenko, P. Y.$$b0
000874993 245__ $$aField-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6
000874993 260__ $$aCollege Park, Md.$$bAPS$$c2020
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000874993 520__ $$aIn 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.
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000874993 7001_ $$00000-0002-6234-0575$$aAkbari, A.$$b1
000874993 7001_ $$0P:(DE-HGF)0$$aNikitin, S. E.$$b2
000874993 7001_ $$0P:(DE-HGF)0$$aCameron, A. S.$$b3
000874993 7001_ $$0P:(DE-HGF)0$$aDukhnenko, A. V.$$b4$$eCorresponding author
000874993 7001_ $$0P:(DE-HGF)0$$aFilipov, V. B.$$b5
000874993 7001_ $$0P:(DE-HGF)0$$aShitsevalova, N. Yu.$$b6
000874993 7001_ $$0P:(DE-Juel1)159141$$aČermák, P.$$b7
000874993 7001_ $$0P:(DE-Juel1)174091$$aRadelytskyi, I.$$b8$$ufzj
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000874993 7001_ $$0P:(DE-HGF)0$$aOllivier, J.$$b10
000874993 7001_ $$00000-0001-9366-6319$$aPodlesnyak, A.$$b11
000874993 7001_ $$0P:(DE-HGF)0$$aHuesges, Z.$$b12
000874993 7001_ $$0P:(DE-Juel1)165895$$aXu, J.$$b13
000874993 7001_ $$0P:(DE-HGF)0$$aIvanov, A.$$b14
000874993 7001_ $$0P:(DE-HGF)0$$aSidis, Y.$$b15
000874993 7001_ $$0P:(DE-HGF)0$$aPetit, S.$$b16
000874993 7001_ $$0P:(DE-HGF)0$$aMignot, J.-M.$$b17
000874993 7001_ $$0P:(DE-HGF)0$$aThalmeier, P.$$b18$$eCorresponding author
000874993 7001_ $$00000-0003-0639-2503$$aInosov, D. S.$$b19$$eCorresponding author
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