论文标题
两种类型的超导对在条纹订购的la $ _ {2-x} $ ba $ _ {x} $ cuo $ _4 $（$ x = 1/8 $）：电阻率测量的证据
Two types of superconducting pairs in stripe-ordered La$_{2-x}$Ba$_{x}$CuO$_4$ ($x=1/8$): evidence from the resistivity measurements
论文作者
论文摘要
$ _ {2-x} $ _x $ _x $ _x $ cuo $ _4 $（lbco）的最新角度分辨$ c $轴电阻率测量$ x = 1/8 $显示出意外的依赖于平面磁场的方向。我们认为，这些和其他可用数据的$ C $轴传输指向在$ x = 1/8 $ lbco中存在两种不同类型的超导对，低于条纹订购温度。一对一对携带有限动量，并局限于Cu-O平面；其他类型的对（可能是零动量的常规$ D $波）沿着狭窄的导电频道传播，以$ c $轴方向穿越样品。这一点的证据来自观察到的$ C $轴电阻率的指数温度依赖性$ρ_C（t）$，我们将其归因于超导阶段和通量流的热激发滑动。我们提出了一个简单的理论，可以符合观察到的$π/2 $周期依赖性$ρ_c$对平面磁场和其他数据的方向。
Recent angle-resolved $c$-axis resistivity measurements of the stripe-ordered La$_{2-x}$Ba$_x$CuO$_4$ (LBCO) with $x=1/8$ revealed an unexpected dependence on the direction of the in-plane magnetic field. We argue that these and other available data for the $c$-axis transport point to the existence of superconducting pairs of two different types in the $x=1/8$ LBCO below the stripe ordering temperature. The pairs of one type carry finite momentum and are confined to the Cu-O planes; the pairs of other type (probably the conventional $d$-wave with zero momentum) propagate along narrow conducting channels traversing the sample in the $c$-axis direction. The evidence for this comes from the observed exponential temperature dependence of the $c$-axis resistivity $ρ_c(T)$ which we attribute to the thermally excited slips of the superconducting phase and flux flows. We present a simple theory to fit the observed $π/2$-periodic dependence of $ρ_c$ on the direction of the in-plane magnetic field and the other data.
