论文标题
fulde-Ferrell有限大小超导体中的顺磁性Meissner，涡流和“洋葱”基态
Paramagnetic Meissner, vortex and 'onion' ground states in Fulde-Ferrell finite-size superconductor
论文作者
论文摘要
从理论上讲，我们发现有限尺寸的fulde-ferrell（ff）超导体（其特征是在空间上不均匀的基态$ψ\ sim \ sim \ sim \ text {exp {exp}（ - i {\ bf q} _ {ff} _ {ff} {ff} {\ bf r} {\ bf r}参数）具有$ |ψ|（r）\ neq const $的顺磁性meissner，Vortex和“洋葱”接地状态。当超导体的横向大小$ l \ sim 1/q_ {ff} $时，这些状态是由于边界效应而实现的。我们认为，可以在由超导体 - feRromagnet非正式金属三层制成的薄磁盘/正方形中观察到预测状态，并使用$ l \ simeq 150-600 nm $。
We theoretically find that finite size Fulde-Ferrell (FF) superconductor (which is characterized by spatially nonuniform ground state $Ψ\sim \text{exp}(-i{\bf q}_{FF}{\bf r})$ and $|Ψ|(r)=const$ in the bulk case, where $Ψ$ is a superconducting order parameter) has paramagnetic Meissner, vortex and 'onion' ground states with $|Ψ|(r) \neq const$. These states are realized due to boundary effect when the lateral size of superconductor $L \sim 1/q_{FF}$. We argue, that predicted states could be observed in thin disk/square made of superconductor-ferromagnet-normal metal trilayer with $L \simeq 150-600 nm$.
