An organizing principle for two-dimensional strongly correlated superconductivity.
An organizing principle for two-dimensional strongly correlated superconductivity.
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DOI：
10.1038/srep22715
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发表时间：
2016-03-11
影响因子：
4.6
通讯作者：
Tremblay AM
中科院分区：
文献类型：
--
作者：
Fratino L;Sémon P;Sordi G;Tremblay AM
铜氧化物的超导电性表现出许多不寻常的特征。我们研究二维哈伯德模型与元胞动力学平均场理论，以解决这些不寻常的功能，并将它们与其他正常状态的现象，如赝能隙。以前的研究发现，这种方法在低温下掺杂的莫特绝缘体的赝隙相出现。在较高掺杂下，该相和相关金属之间的低温转变是一级的。一系列的交叉出现沿着Widom线延伸的一级过渡在超临界区。在这里，我们表明，高度不对称的圆顶的动态平均场超导转变温度，最大的凝聚能作为掺杂的函数，最大和正常状态的散射率之间的相关性，从势能驱动的配对机制到动能驱动的配对机制的变化都可以首先被理解为正常状态的残余。有序转变及其相关的交叉，也作为超导态的组织原则。
Superconductivity in the cuprates exhibits many unusual features. We study the two-dimensional Hubbard model with plaquette dynamical mean-field theory to address these unusual features and relate them to other normal-state phenomena, such as the pseudogap. Previous studies with this method found that upon doping the Mott insulator at low temperature a pseudogap phase appears. The low-temperature transition between that phase and the correlated metal at higher doping is first-order. A series of crossovers emerge along the Widom line extension of that first-order transition in the supercritical region. Here we show that the highly asymmetric dome of the dynamical mean-field superconducting transition temperature , the maximum of the condensation energy as a function of doping, the correlation between maximum and normal-state scattering rate, the change from potential-energy driven to kinetic-energy driven pairing mechanisms can all be understood as remnants of the normal state first-order transition and its associated crossovers that also act as an organizing principle for the superconducting state.