Author:
Wang Xingyu,Gong Dongliang,Liu Bo,Ma Xiaoyan,Zhao Jinyu,Wang Pengyu,Sheng Yutao,Guo Jing,Sun Liling,Zhang Wen,Lai Xinchun,Tan Shiyong,Yang Yi-feng,Li Shiliang
Abstract
We investigate the uniaxial-pressure dependence of resistivity for URu2−x
Fe
x
Si2 samples with x = 0 and 0.2, which host a hidden order (HO) and a large-moment antiferromagnetic (LMAFM) phase, respectively. For both samples, the elastoresistivity ζ shows a seemingly divergent behavior above the transition temperature T
0 and a quick decrease below it. We find that the temperature dependence of ζ for both samples can be well described by assuming the uniaxial pressure effect on the gap or certain energy scale except for ζ
(110) of the x = 0 sample, which exhibits a nonzero residual value at 0 K. We show that this provides a qualitative difference between the HO and LMAFM phases. Our results suggest that there is an in-plane anisotropic response to the uniaxial pressure that only exists in the hidden order state without necessarily breaking the rotational lattice symmetry.
Subject
General Physics and Astronomy
Cited by
2 articles.
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