论文标题
$ t = 0 $的纯层D波超导体中平行上临界磁场的四倍的各向异性
Four-fold anisotropy of the parallel upper critical magnetic field in a pure layered d-wave superconductor at $T = 0$
论文作者
论文摘要
众所周知，在准二维（Q2D）$ d $ - 波超导体中的金茨堡 - 兰道（GL）区域中，平行上临界磁场的四倍对称消失。因此，它已被准确地计算为对GL结果的校正，该结果靠近超导过渡温度，预计在低温下会更强。至于$ t = 0 $的情况，已经使用了一些近似方法，这些方法仅适用于封闭的电子轨道，并且不适合Q2D超导体中平行磁场中存在的开放轨道。我们首次准确地计算出纯Q2D $ d $ - 波超导体在$ t = 0 $中的平行上临界磁场的四倍各向异性，其中它具有最高的值。我们的结果适用于Q2D $ D $ - 波高-TC和有机超导体。
It is well known that a four-fold symmetry of the parallel upper critical magnetic field disappears in the Ginzburg-Landau (GL) region in quasi-two-dimensional (Q2D) $d$-wave superconductors. Therefore, it has been accurately calculated so far as a correction to the GL results, which is valid close to superconducting transition temperature and is expected to be stronger at low temperatures. As to the case $T=0$, some approximated methods have been used, which are good only for closed electron orbits and unappropriate for the open orbits which exist in a parallel magnetic field in Q2D superconductors. For the first time, we accurately calculate the four-fold anisotropy of the parallel upper critical magnetic field in a pure Q2D $d$-wave superconductor at $T=0$, where it has the highest possible value. Our results are applicable to Q2D $d$-wave high-Tc and organic superconductors.
