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Title: Evolution of the propagation vector of antiferroquadrupolar phases in Ce 3 Pd 20 Si 6 under magnetic field

Abstract

Hidden-order phases that occur in a number of correlated $f$-electron systems are among the most elusive states of electronic matter. Their investigations are hindered by the insensitivity of standard physical probes, such as neutron diffraction, to the order parameter that is usually associated with higher-order multipoles of the $f$ orbitals. The heavy-fermion compound Ce 3Pd 20Si 6 exhibits magnetically hidden order at subkelvin temperatures, known as phase II. Additionally, for magnetic field applied along the [001] cubic axis, another phase II′ was detected, but the nature of the transition from phase II to phase II′ remained unclear. Here we use inelastic neutron scattering to argue that this transition is most likely associated with a change in the propagation vector of the antiferroquadrupolar order from (111) to (100). Despite the absence of magnetic Bragg scattering in phase II′, its ordering vector is revealed by the location of an intense magnetic soft mode at the (100) wave vector, that is orthogonal to the applied field. At the II- II′ transition, this mode softens and transforms into quasielastic and nearly Q-independent incoherent scattering, which is likely related to the non-Fermi-liquid behavior recently observed at this transition. Our experiment also reveals sharp collective excitationsmore » in the field-polarized paramagnetic phase, after phase II′ is suppressed in fields above 4 T.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [5]; ORCiD logo [6];  [7];  [8];  [1]
  1. Technische Univ. of Dresden (Germany)
  2. Technische Univ. of Dresden (Germany); Max-Planck-Inst. für Chemische Physik fester Stoffe, Dresden (Germany)
  3. Vienna Univ. of Technology (Austria). Inst. of Solid State Physics
  4. Lab. Léon Brillouin, Gif sur Yvette (France)
  5. Inst. Laue-Langevin, Grenoble (France)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  7. China Inst. of Atomic Energy, Beijing (China); Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin (Germany)
  8. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin (Germany)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1531202
Alternate Identifier(s):
OSTI ID: 1529035
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 21; Journal ID: ISSN 2469-9950
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., Nikitin, S. E., Prokofiev, A., Paschen, S., Mignot, Jean-Michel, Ollivier, J., Podlesnyak, Andrey, Meng, Siqin, Lu, Zhilun, and Inosov, Dmytro S. Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.214431.
Portnichenko, P. Y., Nikitin, S. E., Prokofiev, A., Paschen, S., Mignot, Jean-Michel, Ollivier, J., Podlesnyak, Andrey, Meng, Siqin, Lu, Zhilun, & Inosov, Dmytro S. Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field. United States. doi:10.1103/PhysRevB.99.214431.
Portnichenko, P. Y., Nikitin, S. E., Prokofiev, A., Paschen, S., Mignot, Jean-Michel, Ollivier, J., Podlesnyak, Andrey, Meng, Siqin, Lu, Zhilun, and Inosov, Dmytro S. Mon . "Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field". United States. doi:10.1103/PhysRevB.99.214431.
@article{osti_1531202,
title = {Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field},
author = {Portnichenko, P. Y. and Nikitin, S. E. and Prokofiev, A. and Paschen, S. and Mignot, Jean-Michel and Ollivier, J. and Podlesnyak, Andrey and Meng, Siqin and Lu, Zhilun and Inosov, Dmytro S.},
abstractNote = {Hidden-order phases that occur in a number of correlated $f$-electron systems are among the most elusive states of electronic matter. Their investigations are hindered by the insensitivity of standard physical probes, such as neutron diffraction, to the order parameter that is usually associated with higher-order multipoles of the $f$ orbitals. The heavy-fermion compound Ce3Pd20Si6 exhibits magnetically hidden order at subkelvin temperatures, known as phase II. Additionally, for magnetic field applied along the [001] cubic axis, another phase II′ was detected, but the nature of the transition from phase II to phase II′ remained unclear. Here we use inelastic neutron scattering to argue that this transition is most likely associated with a change in the propagation vector of the antiferroquadrupolar order from (111) to (100). Despite the absence of magnetic Bragg scattering in phase II′, its ordering vector is revealed by the location of an intense magnetic soft mode at the (100) wave vector, that is orthogonal to the applied field. At the II-II′ transition, this mode softens and transforms into quasielastic and nearly Q-independent incoherent scattering, which is likely related to the non-Fermi-liquid behavior recently observed at this transition. Our experiment also reveals sharp collective excitations in the field-polarized paramagnetic phase, after phase II′ is suppressed in fields above 4 T.},
doi = {10.1103/PhysRevB.99.214431},
journal = {Physical Review B},
number = 21,
volume = 99,
place = {United States},
year = {2019},
month = {6}
}

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This content will become publicly available on June 24, 2020
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