Anisotropic uniaxial pressure response of the Mott insulat or Ca_2RuO_4
Anisotropic uniaxial pressure response of the Mott insulat or Ca_2RuO_4
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Mott 绝缘体或 Ca_2RuO_4 的各向异性单轴压力响应
DOI：
10.1103/physrevb.88.205111
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and Yoshiteru Maeno
中科院分区：
文献类型：
--
作者：
Haruka Taniguchi;Keigo Nishimura;Ryo Ishikawa;Shingo Yonezawa;Swee K. Goh;Fumihiko Nakamura;and Yoshiteru Maeno
通过电阻率和磁化强度的测量，研究了面内单轴压力对反铁磁Mott绝缘体CaRuO的影响。我们成功地诱导铁磁金属相在较低的临界压力比静水压力，表明平面内单轴压力下的RuO八面体的扁平变形更容易释放。我们还发现了一个惊人的面内各向异性的压力响应中的各种磁相：虽然磁化强度单调增加的压力对角的正交主轴，磁化强度表现出特殊的依赖于压力沿着面内正交主轴。这种特殊的依赖性可以解释的单轴压力效应之间的质量差异沿着正交轴，以及由孪晶畴结构的存在。
We have investigated the in-plane uniaxial pressure effect on the antiferromagnetic Mott insulator CaRuOfrom resistivity and magnetization measurements. We succeeded in inducing the ferromagnetic metallic phase at lower critical pressure than by hydrostatic pressure, indicating that the flattening distortion of the RuOoctahedra is more easily released under in-plane uniaxial pressure. We also found a striking in-plane anisotropy in the pressure responses of various magnetic phases: although the magnetization increases monotonically with pressure diagonal to the orthorhombic principal axes, the magnetization exhibits peculiar dependence on pressure along the in-plane orthorhombic principal axes. This peculiar dependence can be explained by a qualitative difference between the uniaxial pressure effects along the orthorhombicandaxes, as well as by the presence of twin domain structures.