...
首页> 外文期刊>Physical Review X >Anomalous Transport in Sketched Nanostructures at the class='aps-inline-formula'>LaAlO3/SrTiO3 Interface
【24h】

Anomalous Transport in Sketched Nanostructures at the class='aps-inline-formula'>LaAlO3/SrTiO3 Interface

机译:草绘的纳米结构中 class =“ aps-inline-formula”> LaAlO 3 上的异常传输 / SrTiO 3 界面

获取原文
           

摘要

The oxide heterostructure LaAlO3/SrTiO3 supports a two-dimensional electron liquid with a variety of competing phases, including magnetism, superconductivity, and weak antilocalization because of Rashba spin-orbit coupling. Further confinement of this two-dimensional electron liquid to the quasi-one-dimensional regime can provide insight into the underlying physics of this system and reveal new behavior. Here, we describe magnetotransport experiments on narrow LaAlO3/SrTiO3 structures created by a conductive atomic force microscope lithography technique. Four-terminal local-transport measurements on Hall bar structures about 10?nm wide yield longitudinal resistances that are comparable to the resistance quantum h/e2 and independent of the channel length. Large nonlocal resistances (as large as 104??Ω) are observed in some but not all structures with separations between current and voltage that are large compared to the two-dimensional mean-free path. The nonlocal transport is strongly suppressed by the onset of superconductivity below about 200?mK. The origin of these anomalous transport signatures is not understood, but may arise from coherent transport defined by strong spin-orbit coupling and/or magnetic interactions.
机译:氧化物异质结构LaAlO3 / SrTiO3支持具有多种竞争相的二维电子液体,这些竞争相包括磁性,超导性和由于Rashba自旋轨道耦合而引起的弱局部性。将此二维电子液体进一步限制在准一维状态下,可以深入了解该系统的基本物理原理并揭示新的行为。在这里,我们描述了通过导电原子力显微镜光刻技术创建的狭窄LaAlO3 / SrTiO3结构的磁传输实验。在约10?nm宽的霍尔棒结构上进行四端局部传输测量,得出的纵向电阻可与电阻量子h / e2相媲美,并且与沟道长度无关。在某些但不是全部结构中,观察到较大的非局部电阻(高达104ΩΩ),与二维均值-自由路径相比,电流和电压之间的间隔较大。低于200?mK的超导性的开始强烈地抑制了非局部传输。这些异常传输特征的起源尚不清楚,但可能是由强自旋轨道耦合和/或磁性相互作用所定义的相干传输引起的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利