论文标题
BI2SR2CA2CU3O10+δ三层蛋白酶中超导性和准粒子干扰的异常掺杂演变
Anomalous doping evolution of superconductivity and quasiparticle interference in Bi2Sr2Ca2Cu3O10+δ trilayer cuprates
论文作者
论文摘要
我们使用扫描隧道显微镜研究BI2SR2CA2CU3O10+δ三层蛋白酶，从最佳掺杂到过度掺杂的状态。我们发现，与几乎恒定的TC形成鲜明对比的是，内部和外CUO2平面的两个不同的超导间隙都随着掺杂而迅速减小。光谱成像揭示了在过度分类样品的抗邻近区域中不存在准粒子干扰，在单层和双层化合物中显示出与单层和双层化合物相反的趋势。我们建议存在两种类型的不相等的CuO2平面，并且它们之间的复杂相互作用是三层蛋白酶中这些高度异常的观察结果的原因。
We use scanning tunneling microscopy to investigate Bi2Sr2Ca2Cu3O10+δ trilayer cuprates from the optimally doped to overdoped regime. We find that the two distinct superconducting gaps from the inner and outer CuO2 planes both decrease rapidly with doping, in sharp contrast to the nearly constant Tc. Spectroscopic imaging reveals the absence of quasiparticle interference in the antinodal region of overdoped samples, showing an opposite trend to that in single- and double-layer compounds. We propose that the existence of two types of inequivalent CuO2 planes and the intricate interaction between them are responsible for these highly anomalous observations in trilayer cuprates.
