论文标题
单轴压力引起的条纹订单旋转在la $ _ {1.88} $ sr $ _ {0.12} $ CUO $ _4 $
Uniaxial Pressure Induced Stripe Order Rotation in La$_{1.88}$Sr$_{0.12}$CuO$_4$
论文作者
论文摘要
静态条纹顺序不利于超导性。然而，已经提出，横条纹波动可能会增强条纹间的约瑟夫森耦合，从而促进超导性。但是，对条纹动力学的直接实验研究仍然很困难。从强耦合的角度来看，横条纹波动以动态“扭结”的形式实现 - 侧向转条纹部分。在这里，我们展示了适度的单轴压力调整如何重新组织定向扭结。我们的起点是la $ _ {1.88} $ sr $ _ {0.12} $ cuo $ _4 $，其中横向扭结订购会导致远离晶体轴的条纹旋转。轻度单轴压力的应用会改变排序模式，并将条纹顺序固定到晶体轴上。这种重新排序发生在弱化的压力下，这比阻止条纹域的距离，并提出相当弱的横条纹刚度。弱空间刚度和横向量子波动可能是条纹与超导性共存的关键先决条件。
Static stripe order is detrimental to superconductivity. Yet, it has been proposed that transverse stripe fluctuations may enhance the inter-stripe Josephson coupling and thus promote superconductivity. Direct experimental studies of stripe dynamics, however, remain difficult. From a strong-coupling perspective, transverse stripe fluctuations are realized in the form of dynamic "kinks" -- sideways shifting stripe sections. Here, we show how modest uniaxial pressure tuning reorganizes directional kink alignment. Our starting point is La$_{1.88}$Sr$_{0.12}$CuO$_4$, where transverse kink ordering results in a rotation of stripe order away from the crystal axis. Application of mild uniaxial pressure changes the ordering pattern and pins the stripe order to the crystal axis. This reordering occurs at a much weaker pressure than that to detwin the stripe domains and suggests a rather weak transverse stripe stiffness. Weak spatial stiffness and transverse quantum fluctuations are likely key prerequisites for stripes to coexist with superconductivity.
