论文标题
多次超导体中的异国情调间配对
Exotic interband pairing in multiband superconductors
论文作者
论文摘要
与通常的假设相反，具有自旋轨道耦合的晶体中的电子态并不总是以与纯旋转1/2状态相同的对称操作转换。这对超导体的对称特性和淋巴结结构产生了深远的影响，尤其是对带间隙函数。专注于四方超导体，我们表明传统（S-WAVE）通道中的带间配对可以具有传统上与非常规配对相关的特征，例如三重态组件和奇特的奇偶校验，并且可以在激发能量隙中产生线节点。在D-WAVE情况下，边界配对在动量中也可能是奇怪的，并且具有三重态组件，会改变节点线的位置和拓扑。
Contrary to the usual assumption, the electron Bloch states in crystals with spin-orbit coupling do not always transform under symmetry operations in the same way as the pure spin-1/2 states. This has profound consequences for the symmetry properties and nodal structure of superconductors, especially for the interband gap functions. Focusing on tetragonal superconductors, we show that the interband pairing in the conventional (s-wave) channel can have features which are traditionally associated with unconventional pairing, such as triplet components and odd parity, and can produce line nodes in the excitation energy gap. In the d-wave case, the interband pairing, which can also be odd in momentum and have a triplet component, changes the positions and topology of the nodal lines.
