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arXiv 0906.3040cond-mat.str-el
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用杂质掺杂揭示URu2Si2中的隐序

Uncovering the Hidden Order in URu2Si2 by Impurity Doping

S. -H. Baek, M. J. Graf, A. V. Balatsky, E. D. Bauer, J. C. Cooley, J. L. Smith, N. J. Curro

摘要:

本文报道了在相变温度T0 ~ 17.5K范围内,用杂质探测强关联金属URu_2Si_2的隐藏序参量。这个序参量的性质已经困扰了研究人员二十多年,但伴随着单粒子态密度的部分间隙的发展,可以通过测量电子比热和核自旋晶格弛豫速率来检测。我们发现,在隐藏的顺序相的杂质引起局部补丁的反铁磁性。通过对反铁磁性和隐序之间耦合的分析,发现反铁磁性不是竞争的序参量,而是对隐序的寄生效应。

英文摘要:

We report the use of impurities to probe the hidden order parameter of the strongly correlated metal URu_2Si_2 below the transition temperature T_0 ~ 17.5 K. The nature of this order parameter has eluded researchers for more than two decades, but is accompanied by the development of a partial gap in the single particle density of states that can be detected through measurements of the electronic specific heat and nuclear spin-lattice relaxation rate. We find that impurities in the hidden order phase give rise to local patches of antiferromagnetism. An analysis of the coupling between the antiferromagnetism and the hidden order reveals that the former is not a competing order parameter but rather a parasitic effect of the latter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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