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Tunable Magnetic Scattering Effects at the LaAlO3/SrTiO3 Interface by Ionic Liquid Gating
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-11-19 , DOI: 10.1021/acsaelm.0c00654 Chunhai Yin 1 , Kumar Prateek 1 , Wouter Gelling 1 , Jan Aarts 1
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-11-19 , DOI: 10.1021/acsaelm.0c00654 Chunhai Yin 1 , Kumar Prateek 1 , Wouter Gelling 1 , Jan Aarts 1
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The gating effect achieved by an ionic liquid and its electric double layer allows for charge transfer, which can be an order of magnitude larger than that with conventional dielectrics. However, large charged ions also cause inevitable Coulomb scattering in the conducting channel formed at the interface, which can limit the carrier mobility enhancement. In this work, we study the effect of LaAlO3 thickness on the transport properties in LaAlO3/SrTiO3 heterostructures by ionic liquid gating. We find that the transport properties of the LaAlO3/SrTiO3 interface are dominated by intrinsic interactions rather than LaAlO3 thickness and possible effects of ions in the liquid. We observe a Kondo effect, which is enhanced while increasing the gate voltage. For the smallest thickness of the LAO layer, we also observe a gate-tunable and temperature-dependent anomalous Hall effect, which always emerges near the Kondo temperature. Our experiments pave the way to manipulate the various magnetic interactions at the LaAlO3/SrTiO3 interface.
中文翻译：
离子液体门控在LaAlO 3 / SrTiO 3界面上的可调谐磁散射效应
通过离子液体及其双电层实现的门控效果可实现电荷转移，该电荷转移可以比常规电介质大一个数量级。但是，大的带电离子还会在界面处形成的导电通道中引起不可避免的库仑散射，这会限制载流子迁移率的提高。在这项工作中，我们研究了离子液体浇注对LaAlO 3厚度对LaAlO 3 / SrTiO 3异质结构中输运性能的影响。我们发现，LaAlO 3 / SrTiO 3界面的传输性质受固有相互作用的支配，而不是LaAlO 3液体中离子的厚度和可能的影响。我们观察到近藤效应，当增加栅极电压时增强。对于LAO层的最小厚度，我们还观察到了门可调和随温度变化的异常霍尔效应，该效应总是在近藤温度附近出现。我们的实验为在LaAlO 3 / SrTiO 3界面处操纵各种磁性相互作用铺平了道路。
更新日期：2020-12-22
中文翻译：
离子液体门控在LaAlO 3 / SrTiO 3界面上的可调谐磁散射效应
通过离子液体及其双电层实现的门控效果可实现电荷转移，该电荷转移可以比常规电介质大一个数量级。但是，大的带电离子还会在界面处形成的导电通道中引起不可避免的库仑散射，这会限制载流子迁移率的提高。在这项工作中，我们研究了离子液体浇注对LaAlO 3厚度对LaAlO 3 / SrTiO 3异质结构中输运性能的影响。我们发现，LaAlO 3 / SrTiO 3界面的传输性质受固有相互作用的支配，而不是LaAlO 3液体中离子的厚度和可能的影响。我们观察到近藤效应，当增加栅极电压时增强。对于LAO层的最小厚度，我们还观察到了门可调和随温度变化的异常霍尔效应，该效应总是在近藤温度附近出现。我们的实验为在LaAlO 3 / SrTiO 3界面处操纵各种磁性相互作用铺平了道路。
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