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Topological superconducting vortex from trivial electronic bands.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials
  • Superconductivity

Background:

  • Superconducting vortices are investigated as potential traps for non-Abelian Majorana quasi-particles.
  • Conventional understanding posits that bulk-state topology is essential for Majorana zero modes in solid-state systems.
  • Current research focuses on intrinsic topological superconductors or superconducting topological materials.

Purpose of the Study:

  • To demonstrate that Majorana-carrying superconducting vortices can emerge from topologically trivial quantum materials.
  • To challenge the prevailing belief that bulk-state topology is a prerequisite for vortex-based Majorana modes.
  • To propose new avenues for Majorana quasi-particle research.

Main Methods:

  • Theoretical prediction of anomalous vortex topological physics in superconducting HgTe-class materials.
  • Analysis of trivial band structures in inducing non-trivial topological phenomena.
  • Discussion of strain-controlled Majorana engineering schemes.

Main Results:

  • Majorana modes can be hosted by superconducting vortices in topologically trivial materials.
  • Trivial bands in HgTe-class materials exhibit anomalous vortex topological physics.
  • Experimental signatures for detecting vortex Majorana modes are proposed.

Conclusions:

  • Bulk-state topology is not exclusively required for Majorana-carrying superconducting vortices.
  • Topologically trivial quantum materials offer a new platform for Majorana research.
  • The findings provide novel guidelines for searching for vortex-based Majorana modes in superconductors.