论文标题
单层FESE在SRTIO $ _3 $上的多通道超导性：自旋波动与电子相互作用的相互作用
Multichannel superconductivity of monolayer FeSe on SrTiO$_3$: Interplay of spin fluctuations and electron-phonon interaction
论文作者
论文摘要
我们研究了电子音波耦合以及单层FESE对超导状态的自旋和电荷波动的影响，对SRTIO $ _3 $底物的影响。库珀配对的这三个骨介体在多通道，全频宽度，多频道和各向异性埃利亚斯贝格（Eliashberg）的相互作用状态理论中进行了平等的治疗。我们的自一致计算表明，超导间隙的S波对称性仅与完全没有自旋波动的完全不兼容。当存在自旋波动时，总是会获得改变签名的无节状D波配对对称性，但是解释间隙幅度和临界温度的必不可少的成分仍然是界面电子 - phonon相互作用。
We investigate the effects of electron-phonon coupling, as well as of spin and charge fluctuations on the superconducting state in a single layer of FeSe on SrTiO$_3$ substrate. These three bosonic mediators of Cooper pairing are treated on equal footing in a multichannel, full-bandwidth, multiband, and anisotropic Eliashberg theory of the interacting state. Our self-consistent calculations show that an s-wave symmetry of the superconducting gap is compatible only with a complete absence of spin fluctuations. When spin fluctuations are present, the sign-changing nodeless d-wave pairing symmetry is always obtained, yet the essential ingredient for explaining the gap magnitude and critical temperature is still the interfacial electron-phonon interaction.
