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arXiv 1708.07091cond-mat.str-el
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正交晶格畸变对CeAuSb $_2$反铁磁相的影响

Effect of Applied Orthorhombic Lattice Distortion on the Antiferromagnetic Phase of CeAuSb$_2$

Joonbum Park, Hideaki Sakai, Onur Erten, Andrew P. Mackenzie, Clifford W. Hicks

摘要:

我们研究了CeAuSb $_2$的反铁磁性对通过面内单轴压力施加的正交晶格畸变的响应。对沿$\langle 110 \rangle$晶格方向施加的压力的响应显示在零压力下的一级转变,这表明磁序提升了无应力晶格的$(110)/(1\bar{1}0)$对称性。足够的$\langle 100 \rangle$压力似乎使主轴从$\langle 110 \rangle$旋转到$\langle 100 \rangle$。在低的$\langle 100 \rangle$压力下,$T_N$的转变是弱的一级转变,然而,在阈值$\langle 100 \rangle$压力以上,转变变得连续。我们讨论了这种行为是由序参量波动驱动的可能性,与恢复的连续过渡的结果,减少点群对称的晶格。

英文摘要:

We study the response of the antiferromagnetism of CeAuSb$_2$ to orthorhombic lattice distortion applied through in-plane uniaxial pressure. The response to pressure applied along a $\langle 110 \rangle$ lattice direction shows a first-order transition at zero pressure, which shows that the magnetic order lifts the $(110)/(1\bar{1}0)$ symmetry of the unstressed lattice. Sufficient $\langle 100 \rangle$ pressure appears to rotate the principal axes of the order from $\langle 110 \rangle$ to $\langle 100 \rangle$. At low $\langle 100 \rangle$ pressure, the transition at $T_N$ is weakly first-order, however it becomes continuous above a threshold $\langle 100 \rangle$ pressure. We discuss the possibility that this behavior is driven by order parameter fluctuations, with the restoration of a continuous transition a result of reducing the point-group symmetry of the lattice.

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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