Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
Phys Rev Lett. 2010 Nov 12;105(20):206404. doi: 10.1103/PhysRevLett.105.206404.
We study theoretically a strongly type-II s-wave superconducting state of two-dimensional Dirac fermions in proximity to a ferromagnet having in-plane magnetization. It is shown that a magnetic domain wall can host a chain of equally spaced vortices in the superconducting order parameter, each of which binds a Majorana-fermion state. The overlap integral of neighboring Majorana states is sensitive to the position of the chemical potential of the Dirac fermions. Thermal transport and scanning tunneling microscopy experiments to probe the Majorana fermions are discussed.
我们从理论上研究了在面内磁化的铁磁体近邻作用下二维狄拉克费米子的强 II 型 s 波超导态。结果表明，磁场畴壁可以在超导序参量中容纳一系列等距的涡旋，每个涡旋都束缚一个马约拉纳费米子态。相邻马约拉纳态的重叠积分对狄拉克费米子的化学势位置敏感。讨论了探测马约拉纳费米子的热输运和扫描隧道显微镜实验。
