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Impurity-induced magnetic ordering inSr2RuO4
Physical Review Research ( IF 3.5 ) Pub Date : 2021-04-23 , DOI: 10.1103/physrevresearch.3.023067 Bastian Zinkl , Manfred Sigrist
Physical Review Research ( IF 3.5 ) Pub Date : 2021-04-23 , DOI: 10.1103/physrevresearch.3.023067 Bastian Zinkl , Manfred Sigrist
Ti substituting Ru in in small concentrations induces incommensurate spin density wave order with a wave vector corresponding to the nesting vector of two of three Fermi surface sheets. We consider a microscopic model for these two bands and analyze the correlation effects leading to magnetic order through nonmagnetic Ti doping. For this purpose we use a position-dependent mean-field approximation for the microscopic model and a phenomenological Ginzburg-Landau approach, which both deliver consistent results and allow us to examine the inhomogeneous magnetic order. Spin-orbit coupling additionally leads to spin currents around each impurity, which in combination with the magnetic polarization produce a charge current pattern. This is also discussed within a gauge-field theory in both charge and spin channel. This spin-orbit coupling effect causes an interesting modification of the magnetic structure if currents run through the system. Our findings allow a more detailed analysis of the experimental data for . In particular, we find that the available measurements are consistent with our theoretical predictions.
中文翻译:
杂质在Sr2RuO4中的磁有序化
用Ti代替Ru in 浓度低时,波矢量会引起自旋密度波阶不相称 对应于三个费米表层中的两个费米表层的嵌套向量。我们考虑了这两个带的微观模型,并分析了通过非磁性Ti掺杂导致磁序的相关效应。为此,我们使用微观模型的位置相关平均场近似和现象学的Ginzburg-Landau方法,二者均能提供一致的结果并允许我们检查不均匀的磁阶。自旋轨道耦合还导致每个杂质周围的自旋电流,这与磁极化结合会产生充电电流模式。在电荷和自旋通道的规范场理论中也对此进行了讨论。如果电流流经系统,则这种自旋轨道耦合效应会引起磁结构的有趣变化。。特别是,我们发现可用的测量结果与我们的理论预测相符。
更新日期:2021-04-23
中文翻译:
杂质在Sr2RuO4中的磁有序化
用Ti代替Ru in 浓度低时,波矢量会引起自旋密度波阶不相称 对应于三个费米表层中的两个费米表层的嵌套向量。我们考虑了这两个带的微观模型,并分析了通过非磁性Ti掺杂导致磁序的相关效应。为此,我们使用微观模型的位置相关平均场近似和现象学的Ginzburg-Landau方法,二者均能提供一致的结果并允许我们检查不均匀的磁阶。自旋轨道耦合还导致每个杂质周围的自旋电流,这与磁极化结合会产生充电电流模式。在电荷和自旋通道的规范场理论中也对此进行了讨论。如果电流流经系统,则这种自旋轨道耦合效应会引起磁结构的有趣变化。。特别是,我们发现可用的测量结果与我们的理论预测相符。