论文标题
摄影诱导的$η$配对在Kondo晶格模型中
Photoinduced $η$ pairing in the Kondo lattice model
论文作者
论文摘要
先前的理论研究表明，哈伯德模型中对莫特绝缘状态的脉冲照射可以诱导由于产生$η$对而产生的超导相关性的增强。在这里，我们表明，可以通过证明脉冲照射确实增强了$η$ pairing的相关性，可以将相同的机制应用于Kondo Lattice模型，这是重型电子系统的有效模型。与Hubbard模型一样，非线性光学过程对于增加光诱导的$η$对的数量至关重要，从而增强了超导相关性。我们还发现脉冲辐照后自旋动力学的扩散行为，表明$η$对数的增加导致传导带和近孔晶格模型中的局部旋转之间的分离，这与光电量效应密不可分。
The previous theoretical study has shown that pulse irradiation to the Mott insulating state in the Hubbard model can induce the enhancement of superconducting correlation due to the generation of $η$ pairs. Here, we show that the same mechanism can be applied to the Kondo lattice model, an effective model for heavy electron systems, by demonstrating that the pulse irradiation indeed enhances the $η$-pairing correlation. As in the case of the Hubbard model, the non-linear optical process is essential to increase the number of photoinduced $η$ pairs and thus the enhancement of the superconducting correlation. We also find the diffusive behavior of the spin dynamics after the pulse irradiation, suggesting that the increase of the number of $η$ pairs leads to the decoupling between the conduction band and the localized spins in the Kondo lattice model, which is inseparably related to the photodoping effect.
