论文标题
在无定形latio3/srtio3接口处的非均匀超导性和准线性磁化
Inhomogeneous superconductivity and quasilinear magnetoresistance at amorphous LaTiO3/SrTiO3 interfaces
论文作者
论文摘要
我们已经研究了LATIO3/SRTIO3（LTO/Sto）异质结构的传输属性。尽管在反射高能电子衍射中观察到2D生长，但透射电子显微镜图像表明，样品倾向于非晶化。尽管如此，我们观察到结构正在进行，其中一些表现出高电导率和/或超导性。我们确定电导率主要在界面的Sto侧产生，并显示了通常在SRTIO3和LATIO3或LAALO3之间的接口上观察到的2维电子气体的所有符号，包括存在两个电子带和带有栅极电压的可调性。磁阻（MR）和超导性的分析表明我们样品中电子特性的空间波动存在。这可以解释观察到的准平面外MR，以及平面内MR的各种特征和观察到的超导性。
We have studied the transport properties of LaTiO3/SrTiO3 (LTO/STO) heterostructures. In spite of 2D growth observed in reflection high energy electron diffraction, Transmission Electron Microscopy images revealed that the samples tend to amorphize. Still, we observe that the structures are conducting, and some of them exhibit high conductance and/or superconductivity. We established that conductivity arises mainly on the STO side of the interface, and shows all the signs of the 2-dimensional electron gas usually observed at interfaces between SrTiO3 and LaTiO3 or LaAlO3, including the presence of two electron bands and tunability with a gate voltage. Analysis of magnetoresistance (MR) and superconductivity indicates presence of a spatial fluctuations of the electronic properties in our samples. That can explain the observed quasilinear out-of-plane MR, as well as various features of the in-plane MR and the observed superconductivity.
