Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in
Abstract
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 ordermore »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1631890
- Alternate Identifier(s):
- OSTI ID: 1615184
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 10 Journal Issue: 2; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Portnichenko, P. Y., Akbari, A., Nikitin, S. E., Cameron, A. S., Dukhnenko, A. V., Filipov, V. B., Shitsevalova, N. Yu., Čermák, P., Radelytskyi, I., Schneidewind, A., Ollivier, J., Podlesnyak, A., Huesges, Z., Xu, J., Ivanov, A., Sidis, Y., Petit, S., Mignot, J. -M., Thalmeier, P., and Inosov, D. S. Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6. United States: N. p., 2020.
Web. doi:10.1103/PhysRevX.10.021010.
Portnichenko, P. Y., Akbari, A., Nikitin, S. E., Cameron, A. S., Dukhnenko, A. V., Filipov, V. B., Shitsevalova, N. Yu., Čermák, P., Radelytskyi, I., Schneidewind, A., Ollivier, J., Podlesnyak, A., Huesges, Z., Xu, J., Ivanov, A., Sidis, Y., Petit, S., Mignot, J. -M., Thalmeier, P., & Inosov, D. S. Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6. United States. https://doi.org/10.1103/PhysRevX.10.021010
Portnichenko, P. Y., Akbari, A., Nikitin, S. E., Cameron, A. S., Dukhnenko, A. V., Filipov, V. B., Shitsevalova, N. Yu., Čermák, P., Radelytskyi, I., Schneidewind, A., Ollivier, J., Podlesnyak, A., Huesges, Z., Xu, J., Ivanov, A., Sidis, Y., Petit, S., Mignot, J. -M., Thalmeier, P., and Inosov, D. S. Tue .
"Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6". United States. https://doi.org/10.1103/PhysRevX.10.021010.
@article{osti_1631890,
title = {Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB 6},
author = {Portnichenko, P. Y. and Akbari, A. and Nikitin, S. E. and Cameron, A. S. and Dukhnenko, A. V. and Filipov, V. B. and Shitsevalova, N. Yu. and Čermák, P. and Radelytskyi, I. and Schneidewind, A. and Ollivier, J. and Podlesnyak, A. and Huesges, Z. and Xu, J. and Ivanov, A. and Sidis, Y. and Petit, S. and Mignot, J. -M. and Thalmeier, P. and Inosov, D. S.},
abstractNote = {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.},
doi = {10.1103/PhysRevX.10.021010},
journal = {Physical Review. X},
number = 2,
volume = 10,
place = {United States},
year = {Tue Apr 14 00:00:00 EDT 2020},
month = {Tue Apr 14 00:00:00 EDT 2020}
}
https://doi.org/10.1103/PhysRevX.10.021010
Web of Science
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