Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling

Details Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling

2010-11-29

arxiv.org/abs/1011.6371v1

Phys. Rev. B 83, 094525 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 9 figures

Scientific paper

10.1103/PhysRevB.83.094525

A recent work [1] demonstrated, for an ideal spinless p+ip superconductor, that Majorana end-states can be realized outside the strict one-dimensional limit, so long as: 1) the sample width does not greatly exceed the superconducting coherence length and 2) an odd number of transverse sub-bands are occupied. Here we extend this analysis to the case of an effective p+ip superconductor engineered from Rashba spin-orbit coupled surface with induced magnetization and superconductivity, and find a number of new features. Specifically, we find that finite size quantization allows Majorana end-states even when the chemical potential is outside of the induced Zeeman gap where the bulk material would not be topological. This is relevant to proposals utilizing semiconducting quantum wires, however, we also find that the bulk energy gap is substantially reduced if the induced magnetization is too large. We next consider a slightly different geometry, and show that Majorana end-states can be created at the ends of ferromagnetic domains. Finally, we consider the case of meandering edges and find, surprisingly, that the existence of well-defined transverse sub-bands is not necessary for the formation of robust Majorana end-states.

Affiliated with

Also associated with

No associations

Rating

Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-443927