Mechanical Analogue of a Majorana Bound State Articles uri icon

authors

  • CHEN, CHUN WEI
  • LERA, NATALIA
  • CHAUNSALI, RAJESH
  • TORRENT, DANIEL
  • ALVAREZ, JOSE VICENTE
  • YANG, JINKYU
  • SAN-JOSE, PABLO
  • CHRISTENSEN, JOHAN

publication date

  • November 2019

issue

  • 51

volume

  • 31

International Standard Serial Number (ISSN)

  • 0935-9648

Electronic International Standard Serial Number (EISSN)

  • 1521-4095

abstract

  • The discovery of topologically nontrivial electronic systems has opened a new age in condensed matter research. From topological insulators to topological superconductors and Weyl semimetals, it is now understood
    that some of the most remarkable and robust phases in electronic systems
    (e.g., quantum Hall or anomalous quantum Hall) are the result of
    topological protection. These powerful ideas have recently begun to be
    explored also in bosonic systems. Topologically protected acoustic,
    mechanical, and optical edge states have been demonstrated in a number
    of systems that recreate the requisite topological conditions. Such
    states that propagate without backscattering could find important
    applications in communications and energy technologies. Here, a
    topologically bound mechanical state, a different class of
    nonpropagating protected state that cannot be destroyed by local
    perturbations, is demonstrated. It is in particular a mechanical
    analogue of the well‐known Majorana bound states (MBSs) of electronic
    topological superconductor systems. The topological binding is
    implemented by creating a Kekulé distortion vortex on a 2D mechanical
    honeycomb superlattice that can be mapped to a magnetic flux vortex in a
    topological superconductor.

keywords

  • Majorana bound states; topological insulators