标题： K$_2$Cr$_3$As$_3$的六带模型中超导性的重新研究 显示英文标题

标题： Revisitation of superconductivity in K$_2$Cr$_3$As$_3$ based on the six-band model

摘要： 我们基于六带模型研究了新合成的准一维 K$_2$Cr$_3$As$_3$超导体的配对对称性。 我们采用标准的随机相位近似来研究该系统的 Hubbard-Hund 模型。 我们的结果确认了我们之前三带模型得出的结论：三重态$p_z$和$f_{y^3-3x^2y}$波配对分别在弱和强 Hund 规则耦合区域中作为主要的配对对称性。 对于物理上现实的参数，由铁磁涨落驱动的三重态$p_z$-波配对是该系统的主导配对对称性。 这两个模型结果之间的一致性表明，所获得的$p_z$-波配对对称性是物理的且与模型无关的。 显示英文摘要

摘要： We investigate the pairing symmetry of the newly synthesized quasi-one-dimension K$_2$Cr$_3$As$_3$ superconductor based on the six-band model. We adopt standard random-phase-approximation to study the Hubbard-Hund model of the system. Our results confirm the conclusions obtained from our previous three-band model: the triplet $p_z$ and $f_{y^3-3x^2y}$ wave pairings serve as the leading pairing symmetries in the weak and strong Hund's rule coupling regimes, respectively. For physically realistic parameters, the triplet $p_z$-wave pairing driven by ferromagnetic fluctuations is the leading pairing symmetry of the system. The consistency between the results of these two models suggests that the obtained $p_z$-wave pairing symmetry is physical and model-independent.