Low-energy subgap states in multichannel p-wave superconducting wires

G. Kells, D. Meidan, P. W. Brouwer

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


One-dimensional p-wave superconductors are known to harbor Majorana bound states at their ends. Superconducting wires with a finite width W may have fermionic subgap states in addition to possible Majorana end states. While they do not necessarily inhibit the use of Majorana end states for topological computation, these subgap states can obscure the identification of a topological phase through a density-of-states measurement. We present two simple models to describe low-energy fermionic subgap states. If the wire's width W is much smaller than the superconductor coherence length ξ, the relevant subgap states are localized near the ends of the wire and cluster near zero energy, whereas the lowest-energy subgap states are delocalized if W ξ. Notably, the energy of the lowest-lying fermionic subgap state (if present at all) has a maximum for W∼ξ.

Original languageEnglish
Pages (from-to)060507.1-060507.5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - 29 Feb 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Low-energy subgap states in multichannel p-wave superconducting wires'. Together they form a unique fingerprint.

Cite this