论文标题
Alo $ _x $/ktao $ _3 $异质结构中的非局部差分阻力
Nonlocal Differential Resistance in AlO$_x$/KTaO$_3$ Heterostructures
论文作者
论文摘要
在Alo $ _x $/ktao $ _3 $异质结构中定义的霍尔杆上的本地和非局部差分电阻测量显示异常行为，取决于晶体方向和施加的后门电压。在直流偏置电流中，局部差分电阻是不对称的，其抗对称成分随着栅极电压的降低而生长。更令人惊讶的是，观察到大型的非局部差分电阻，该电阻在被100微米分离的测量探针之间延伸。讨论了这种异常行为的潜在来源。
Local and nonlocal differential resistance measurements on Hall bars defined in AlO$_x$/KTaO$_3$ heterostructures show anomalous behavior that depends on the crystal orientation and the applied back gate voltage. The local differential resistance is asymmetric in the dc bias current, with an antisymmetric component that grows with decreasing gate voltage. More surprisingly, a large nonlocal differential resistance is observed that extends between measurement probes that are separated by 100s of microns. The potential source of this anomalous behavior is discussed.
