Evidence for hidden quadrupolar fluctuations behind the octupole order in Ce0.7La0.3B6 from resonant x-ray diffraction in magnetic fields
Physical Review B Volume 89 Issue 1
Page 014422-1-014422-13
published_at 2014-01-24
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| File | |
| Title ( eng ) |
Evidence for hidden quadrupolar fluctuations behind the octupole order in Ce0.7La0.3B6 from resonant x-ray diffraction in magnetic fields
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| Creator |
Michimura Shinji
Inami Toshiya
Otsubo Toru
Iga Fumitoshi
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| Source Title |
Physical Review B
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| Volume | 89 |
| Issue | 1 |
| Start Page | 014422-1 |
| End Page | 014422-13 |
| Abstract |
The multipole ordered phase in Ce 0.7 La 0.3 B 6, emerging below 1.5 K and named phase IV, has been studied by resonant x-ray diffraction in magnetic fields. By utilizing diamond x-ray phase plates to rotate the incident linear polarization and a conventional crystal analyzer system, full linear polarization analysis has been performed to identify the order parameters. The analysis shows that the Γ 5g (O yz, O zx, O xy) quadrupoles are more induced by the field than the Γ 3g (O 20 and O 22) quadrupoles on the Γ 5u (T β x+y+z) antiferro-octupole order in phase IV. The problem is that this result is contradictory to a mean-field calculation, which inevitably gives the Γ 3g quadrupole as the main induced moment. This result indicates that the Γ 5g quadrupole order is close in energy. We consider that a large fluctuation of the Γ 5g quadrupole is hidden behind the primary ordering of the Γ 5u octupole and that the multipolar fluctuation significantly affects the ordering phenomenon.
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| Descriptions |
This work was supported by Grants-in-Aid for Scientific Research (Nos. 21204456 and 24340087) from the Japan Society for the Promotion of Science (JSPS), by a Grant-in-Aid for Scientific Research on Innovative Areas “Heavy Electrons” (No. 21102515) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), and by a Basic Science Research Grant from the Sumitomo Foundation.
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2014-01-24 |
| Rights |
Copyright (c) 2014 American Physical Society
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[NCID] AA11187113
[DOI] 10.1103/PhysRevB.89.014422
[DOI] http://dx.doi.org/10.1103/PhysRevB.89.014422
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