Odd-parity electronic multipolar ordering in URu2Si2 : Conclusions from Si and Ru NMR measurements
| Autor: | R. E. Walstedt, Hisatomo Harima, Tatsuma D. Matsuda, T. Hattori, Yoshinori Haga, Yo Tokunaga, N. Higa, S. Kambe, H. Sakai |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Order (ring theory) Space group 02 engineering and technology State (functional analysis) 021001 nanoscience & nanotechnology 01 natural sciences Symmetry (physics) Residual resistivity Local symmetry 0103 physical sciences 010306 general physics 0210 nano-technology Parity bit |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.235142 |
| Popis: | We report $^{29}\mathrm{Si}$ and $^{101}\mathrm{Ru}$ NMR measurements on high-quality, single-crystal ${\mathrm{URu}}_{2}{\mathrm{Si}}_{2}$ samples with a residual resistivity ratio $\mathrm{RRR}\ensuremath{\sim}70$. Our results show that the Si and Ru sites exhibit fourfold electronic symmetry around the $c$ axis in the hidden-order state. A previously observed twofold contribution of Si NMR linewidth is concluded to be due to extrinsic magnetic centers. Since the U and Si sites are aligned along the $c$ axis, we conclude further that the electronic state shows fourfold symmetry around the U site below the hidden-order transition. From this observed local symmetry, possible space groups for the hidden-order state are $P4/nnc$ or $I4/m$, based on group theoretical considerations. Since the order vector is considered to be $Q=(001)$, the hidden-order state is then found to be $P4/nnc$ with rank 5 odd parity, i.e., electric dotriacontapolar order. |
| Databáze: | OpenAIRE |
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