Chain of Majorana States from Superconducting Dirac Fermions at a Magnetic Domain Wall

Details Chain of Majorana States from Superconducting Dirac Fermions at a Magnetic Domain Wall Chain of Majorana States from Superconducting Dirac Fermions at a Magnetic Domain Wall

2010-08-04

arxiv.org/abs/1008.0849v2

Phys. Rev. Lett. 105, 206404 (2010)

Physics

Condensed Matter

Superconductivity

4+ pages, 2 figures

Scientific paper

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. This leads to a characteristic V-shaped dependence of thermal conductivity of Majorana fermions on the chemical potential.

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