Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments

Details Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments

2006-07-28

arxiv.org/abs/cond-mat/0607779v2

Phys. Rev. Lett. 98, 237002 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.98.237002

The zero-energy bound states at the edges or vortex cores of chiral p-wave superconductors should behave like majorana fermions. We introduce a model Hamiltonian that describes the tunnelling process when electrons are injected into such states. Using a non-equilibrium green function formalism, we find exact analytic expressions for the tunnelling current and noise and identify experimental signatures of the majorana nature of the bound states to be found in the shot noise. We discuss the results in the context of different candidate materials that support triplet superconductivity. Experimental verification of the majorana character of midgap states would have important implications for the prospects of topological quantum computation.

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