NMR and NQR investigations of local symmetry in the hidden order phase of URu2Si2

In order to study local symmetries at the 4e(Si)- and 4d(Ru)-sites above and below hidden order transition temperature TO 17.5 K in URu2Si2, we have investigated the nuclear quadrupole interaction by 73Ge-nuclear magnetic resonance (NMR) measurement on a 10% 73Ge-substituted sample URu2(Si0.9Ge0.1)2...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-12, Vol.391 (1)
Main Authors: Mito, T, Hattori, M, Motoyama, G, Sakai, Y, Koyama, T, Ueda, K, Kohara, T, Yokoyama, M, Amitsuka, H
Format: Article
Language:English
Subjects:
Charge distribution
NMR
Nuclear magnetic resonance
Nuclear quadrupole resonance
Parameter modification
Physics
Quadrupole interaction
Quadrupoles
Single crystals
Symmetry
Temperature dependence
Thermal expansion
Transition temperature
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Summary:In order to study local symmetries at the 4e(Si)- and 4d(Ru)-sites above and below hidden order transition temperature TO 17.5 K in URu2Si2, we have investigated the nuclear quadrupole interaction by 73Ge-nuclear magnetic resonance (NMR) measurement on a 10% 73Ge-substituted sample URu2(Si0.9Ge0.1)2, and by 101Ru-nuclear quadrupole resonance (NQR) measurement on a pure single crystal sample. The present 73Ge-NMR measurements do not give any evidence for change in the local symmetry at 4e-site within experimental accuracy. On the other hand, the precise measurement of 101Ru-NQR frequency has detected an anomaly just below TO as sensitively as the thermal expansion measurement dose. Its temperature dependence shows a linear relation with that of the in-plane lattice parameter, which may be a clue to clarify a modification in microscopic charge distribution at TO.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/391/1/012044