73Ge-NMR Investigation of the Hidden Order in URu2Si2

73Ge-NMR Investigation of the Hidden Order in URu2Si2
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URu2Si2 中隐藏订单的 73Ge-NMR 研究

DOI:
10.1143/jpsjs.80sa.sa016
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发表时间:
2011
期刊:
J. Phys. Soc. Jpn.
影响因子:
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通讯作者:
7番目)
7番目)
中科院分区:
--
文献类型:
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作者:
水戸毅;服部翠;本山岳;小原孝夫(5名省略;7番目)

文献摘要

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为了研究URu_2Si_2中Si(4 e)位在隐藏有序温度TO = 17.5K上下的局域对称性,我们对10%73Ge取代的样品URu_2(Si_(0.9)Ge_(0.1))_2进行了~(73)Ge核磁共振(NMR)测量.对本样品的比热测量显示出明显的二级转变,表明隐藏的顺序仍然是一个整体性质。此外,由于核四极相互作用而产生的等分裂~(73)Ge-NMR谱线证明了在Ge取代位上存在相当均匀的电场梯度。虽然这是首次尝试通过证明电相互作用来研究4 e位上的局域对称性,但目前还没有得到对称性降低到TO以下的证据。
In order to investigate the local symmetry at the Si(4e)-site above and below hidden order temperatureTO=17.5 K in URu2Si2, we have carried out73Ge-nuclear magnetic resonance (NMR) measurement on 10%73Ge-substituted sample URu2(Si0.9Ge0.1)2. The specific heat measurement on the present sample shows a clear second-order transition, indicating that the hidden order is still a bulk property. Besides, equally split73Ge-NMR lines due to the nuclear quadrupole interaction gives evidence for fairly uniform electric-field gradient at the Ge-substituted sites, Although this is the first attempt to investigate the local symmetry at the 4e-site by proving electric interactions, no evidence for symmetry lowering belowTOhas been obtained at present.