论文标题
雪松玻色子的超导性研究由抗磁性自旋 - 裂变介导
Schwinger boson study of superconductivity mediated by antiferromagnetic spin-fluctuations
论文作者
论文摘要
我们研究正常金属中的超导性，这是由在邻近的抗磁管绝缘子中通过自旋 - 触发器介导的有效电子电子相互作用引起的。在带有未补偿界面的NéelAntiferromagnet中引入令人沮丧的下一个邻居相互作用，发现超导临界温度随着挫败感的增加而得到增强。此外，对于足够大的下一个最大的邻居相互作用，抗铁磁铁被驱动到条纹相中，这也会引起有吸引力的电子电子相互作用。对于条纹相，如先前报道的Néel相报道，发现超导临界温度被放大，用于未补偿的界面，在该界面中，正常金属传导电子仅耦合到磁体的两个sublattices之一。通过将过渡回到Néel相的过渡，可以进一步增强条纹相位抗铁磁体的波动产生的超导临界温度。
We study superconductivity in a normal metal, arising from effective electron-electron interactions mediated by spin-fluctuations in a neighboring antiferromagnetic insulator. Introducing a frustrating next-nearest neighbor interaction in a Néel antiferromagnet with an uncompensated interface, the superconducting critical temperature is found to be enhanced as the frustration is increased. Further, for sufficiently large next-nearest neighbor interaction, the antiferromagnet is driven into a stripe phase, which can also give rise to attractive electron-electron interactions. For the stripe phase, as previously reported for the Néel phase, the superconducting critical temperature is found to be amplified for an uncompensated interface where the normal metal conduction electrons are coupled to only one of the two sublattices of the magnet. The superconducting critical temperature arising from fluctuations in the stripe phase antiferromagnet can be further enhanced by approaching the transition back to the Néel phase.
