Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO$_3$/SrTiO$_3$ oxide interface
Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO$_3$/SrTiO$_3$ oxide interface
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(111) LaAlO$_3$/SrTiO$_3$ 氧化物界面中的六倍晶体各向异性磁阻
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Y. Dagan
中科院分区：
文献类型：
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作者：
P. K. Rout;I. Agireen;E. Maniv;M. Goldstein;Y. Dagan
我们测量了在(111)LaAlO$3$/SrTiO$3$界面形成的2D电子液体的磁阻。在各向异性磁阻(AMR)和平面霍尔数据中显示了界面的六方对称性，这与我们所做的对称性分析是一致的。六倍分量随着载流子浓度的增加而增加，达到总AMR信号的15%。我们的结果表明，高巡游电子能带与晶体之间的耦合是这一效应的根源，并证明了(111)氧化物界面是一个独特的具有可调磁晶效应的六方系统。
We measured the magnetoresistance of the 2D electron liquid formed at the (111) LaAlO$_3$/SrTiO$_3$ interface. The hexagonal symmetry of the interface is manifested in a six-fold crystalline component appearing in the anisotropic magnetoresistance (AMR) and planar Hall data, which agree well with symmetry analysis we performed. The six-fold component increases with carrier concentration, reaching 15% of the total AMR signal. Our results suggest the coupling between higher itinerant electronic bands and the crystal as the origin of this effect and demonstrate that the (111) oxide interface is a unique hexagonal system with tunable magnetocrystalline effects.