Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.186401
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Funding
- EPSRC [EP/D050952/1]
- EPSRC [EP/D050952/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D050952/1] Funding Source: researchfish
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We provide an argument based on flux insertion to show that certain superconductors with a nontrivial topological invariant have protected zero modes in their vortex cores. This argument has the flavor of a two-dimensional index theorem and applies to disordered systems as well. It also provides a new way of understanding the zero modes in the vortex cores of a spinless p(x) + ip(y) superconductor. Applying this approach to superconductors with and without time-reversal and spin-rotational symmetry, we predict the necessary and sufficient conditions for protected zero modes to exist in their vortices.
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