Related Experiment Video
Updated: Oct 1, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.2K
Inducing chiral superconductivity on honeycomb lattice systems.
Abdulrhman M Alsharari1, Sergio E Ulloa2,3,4
1Department of Physics, University of Tabuk, Tabuk, 71491, Saudi Arabia.
Summary
Superconductivity in graphene systems can exhibit topological phases. This study reveals how spin-orbit coupling influences these phases, leading to robust edge states in nanoribbons.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Graphene-based systems are actively researched for superconductivity, potentially hosting topological phases.
- Chiral symmetry is a key feature in some graphene superconducting systems.
- The impact of spin-orbit coupling on superconducting quasiparticle spectra is not fully understood.
Purpose of the Study:
- To investigate the effect of spin-orbit coupling on the superconducting quasiparticle spectrum in graphene systems.
- To explore the interplay of interaction terms and their role in generating topological behavior.
- To identify conditions for the emergence of edge states in graphene nanoribbons.
Main Methods:
- Utilizing a Bogolyubov-de Gennes (BdG) Hamiltonian framework.
- Analyzing the generation of complex Berry curvatures in the quasiparticle spectrum.
- Investigating the role of chemical potential and superconducting pairing strength.
Main Results:
- Spin-orbit coupling significantly influences the superconducting quasiparticle spectrum.
- Complex Berry curvatures and non-trivial topological behavior were observed.
- Robust midgap edge states appear at zigzag edges of nanoribbons under specific conditions.
Conclusions:
- The topology of the Bogolyubov-de Gennes Hamiltonian dictates the appearance of edge states.
- Robust midgap states at zigzag edges are well-protected by excitation gaps and momentum transfer.
- This research provides insights into topological superconductivity in graphene.
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