论文标题
金属 /高-TC超导体（YBCO）界面的电传导机制
Electrical conduction mechanisms of metal / high-Tc superconductor (YBCO) interfaces
论文作者
论文摘要
Au〜/〜yba $ _2 $ CU $ _3 $ o $ o $ _ {7-δ} $接口（AU/YBCO）的电流电压特性，建立在最佳掺杂的YBCO薄膜上，由脉冲激光沉积生长，由脉冲激光沉积生长，是在50 K到270 K范围内的50 K范围内的50 k范围的温度来测量的。提出了一个非平凡的等效电路模型，该模型揭示了由两个复杂层组成的高度不均匀的场景的存在：一个既呈现非线性的poole-frenkel传统，以及可变的范围跳跃本地化效果（可能与yba $ _2 $ _2 $ _3 $ _3 $ o _ $ _ $ _ $ _ cu y BIND相关），而另一项混合却是一定的，这是一定的含义，而这是一定的混合物。具有不同氧含量的YBCO，其中金属欧姆相仍会渗透。给出了电阻切换产生的效果的显微镜描述，显示了载体陷阱的演变，定位效应和每个状态的介电行为。介电行为是用麦克斯韦 - 沃格纳场景来解释的。
Current-voltage characteristics of Au~/~YBa$_2$Cu$_3$O$_{7-δ}$ interfaces (Au/YBCO), built on optimally-doped YBCO thin films, grown by pulsed laser deposition, were measured as a function of temperature in the 50 K to 270 K range, for two different resistance states. A non-trivial equivalent circuit model is proposed, which reveals the existence of a highly inhomogeneous scenario composed by two complex layers: one presenting both a non-linear Poole-Frenkel conduction as well as Variable Range Hopping localization effects (probably associated with YBa$_2$Cu$_3$O$_{6}$) mixed with a minor metallic phase, while the other is also composed by a mixture of YBCO with different oxygen contents, where a metallic ohmic phase still percolates. A microscopic description of the effects produced by the resistance switching is given, showing the evolution of carrier traps, localization effects and dielectric behavior for each state. The dielectric behavior is interpreted in terms of a Maxwell-Wagner scenario.
