Journal
PHYSICAL REVIEW B
Volume 85, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.235462
Keywords
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Funding
- DFG [SFB-TR 12]
- Danish Council for Independent Research/Natural Sciences
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We study the low-energy band structure of armchair and small-band-gap semiconducting carbon nanotubes with proximity-induced superconducting pairing when a spiral magnetic field creates strong effective spin-orbit interactions from the Zeeman term and a periodic potential from the orbital part. We find that gapless Dirac fermions can be generated by variation of a single parameter. For a small-band-gap semiconducting tube with the field in the same plane, a nondegenerate zero mode at momentum k = 0 can be induced, allowing for the generation of topologically protected Majorana fermion end states.
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