Crystalline Symmetry-Protected Majorana Mode in Number-Conserving Dirac Semimetal Nanowires

Rui Xing Zhang, Chao Xing Liu

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25 Scopus citations


One of the cornerstones for topological quantum computations is the Majorana zero mode, which has been intensively searched in fractional quantum Hall systems and topological superconductors. Several recent works suggest that such an exotic mode can also exist in a one-dimensional (1D) interacting double-wire setup even without long-range superconductivity. A notable instability in these proposals comes from interchannel single-particle tunneling that spoils the topological ground state degeneracy. Here we show that a 1D Dirac semimetal (DSM) nanowire is an ideal number-conserving platform to realize such Majorana physics. By inserting magnetic flux, a DSM nanowire is driven into a 1D crystalline-symmetry-protected semimetallic phase. Interaction enables the emergence of boundary Majorana zero modes, which is robust as a result of crystalline symmetry protection. We also explore several experimental consequences of Majorana signals.

Original languageEnglish (US)
Article number156802
JournalPhysical review letters
Issue number15
StatePublished - Apr 10 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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