论文标题
在洛杉矶的酸奶中竞争超导性的伪造抑制
Pseudogap Suppression by Competition with Superconductivity in La-Based Cuprates
论文作者
论文摘要
我们已经对基于LA的Cuitrates中的伪造相互作用进行了全面的高分辨率角度分辨光谱（ARPES）研究。这三个系统la $ _ {2-x} $ sr $ _x $ cuo $ _4 $，la $ _ {1.6-x} $ _ {0.4} $ _ {0.4} $ sr $ _x $ _x $ _x $ cuo $ _4 $，la $ _ $ _ $ _ {1.8-x} $ _ $ _ $ _4 $ _4 $ _4 $ _4 $ _4 $ _4温度与掺杂相图中的pseudogap临界点。我们已经研究了伪随的进化到超导态的掺杂浓度，恰好低于临界点。在这种情况下，几乎是超导性的最佳掺杂，并且在可能的伪模具中，我们发现了伪群是如何在超导状态内部分抑制的。该结论是基于对伪制能量量表减少的直接观察和伪造抑制的光谱重量的重新出现。这些观察结果总的来说，基于LA的酸奶中的伪群现象与抗鼻光谱重量的超导性竞争。
We have carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates. The three systems La$_{2-x}$Sr$_x$CuO$_4$, La$_{1.6-x}$Nd$_{0.4}$Sr$_x$CuO$_4$, and La$_{1.8-x}$Eu$_{0.2}$Sr$_x$CuO$_4$ display slightly different pseudogap critical points in the temperature versus doping phase diagram. We have studied the pseudogap evolution into the superconducting state for doping concentrations just below the critical point. In this setting, near optimal doping for superconductivity and in the presence of the weakest possible pseudogap, we uncover how the pseudogap is partially suppressed inside the superconducting state. This conclusion is based on the direct observation of a reduced pseudogap energy scale and re-emergence of spectral weight suppressed by the pseudogap. Altogether these observations suggest that the pseudogap phenomenon in La-based cuprates is in competition with superconductivity for anti-nodal spectral weight.
