论文标题
NA $ _2 $ IRO $ _3 $薄水晶设备之间的磁性顺序与电荷定位之间的竞争
Competition between magnetic order and charge localization in Na$_2$IrO$_3$ thin crystal devices
论文作者
论文摘要
旋转轨道辅助的莫特绝缘子，例如钠液（Na $ _2 $ iro $ _3 $），在近年来一直是一个重要的研究主题。在这些材料中，电子相关性的相互作用，自旋轨道耦合，晶体场效应和离子的蜂窝排列带来了令人兴奋的基态，这在Kitaev模型的框架中预测。 Na $ _2 $ IRO $ _3 $的绝缘性特征阻碍了其与电子设备的集成，对于应用程序，例如对拓扑量子计算有趣的Quasiparticles的操作。在这里，我们通过由角度分辨光发射光谱（ARPES）实验支持的电子传输测量结果表明，Na $ _2 $ _2 $ IRO $ _3 $中的电子传输由可变范围跳跃统治，并且很大程度上取决于磁性订购过渡以散装Na $ _2 $ _2 $ _2 $ iro $ _3 $以及外部电气领域等等。电子传输测量值使我们能够推断出我们Na $ _2 $ iro $ _3 $薄水晶设备中的定位长度和状态密度的价值，从而提供了一种研究绝缘材料的替代方法。
Spin orbit assisted Mott insulators such as sodium iridate (Na$_2$IrO$_3$) have been an important subject of study in the recent years. In these materials, the interplay of electronic correlations, spin-orbit coupling, crystal field effects and a honeycomb arrangement of ions bring exciting ground states, predicted in the frame of the Kitaev model. The insulating character of Na$_2$IrO$_3$ has hampered its integration to an electronic device, desirable for applications, such as the manipulation of quasiparticles interesting for topological quantum computing. Here we show through electronic transport measurements supported by Angle Resolved Photoemission Spectroscopy (ARPES) experiments, that electronic transport in Na$_2$IrO$_3$ is ruled by variable range hopping and it is strongly dependent on the magnetic ordering transition known for bulk Na$_2$IrO$_3$, as well as on external electric fields. Electronic transport measurements allow us to deduce a value for the localization length and the density of states in our Na$_2$IrO$_3$ thin crystals devices, offering an alternative approach to study insulating layered materials.
