Multiband-driven anisotropic vortex topology in iron-based superconductors yielding a strain-tunable x-vortex...

Area of Science:

• Condensed Matter Physics
• Superconductivity
• Topological Materials

Background:

• Vortex topology in superconductors is crucial for understanding exotic quantum phenomena.
• Iron-based superconductors (FeSCs) possess complex multiband electronic structures.
• Majorana fermions are exotic particles with potential applications in quantum computing.

Purpose of the Study:

• To investigate the anisotropy of Majorana vortex topology in FeSCs.
• To explore the role of vortex orientation and multiband topology.
• To identify new platforms for Majorana physics and quantum devices.

Main Methods:

• Theoretical analysis of vortex configurations (z-vortex and x-vortex).
• Investigation of topological phase diagrams under varying conditions.
• Examination of the impact of uniaxial strain on vortex properties.

Main Results:

• Pronounced anisotropy in Majorana vortex topology linked to vortex orientation and multiband effects.
• The x-vortex exhibits unique phase bifurcation, supporting Majorana vortices robustly.
• Uniaxial strain controllably modulates x-vortex phases, enabling stable Majorana vortex realization.
• The x-vortex is proposed as a promising platform for Majorana nanowire devices in FeSCs.

Conclusions:

• A novel paradigm in vortex topology for multiband superconductors is introduced.
• The x-vortex configuration in FeSCs is a promising platform for Majorana physics.
• Findings pave the way for advancing FeSC-based quantum devices and Majorana applications.