Soft impurity walls and Weyl-arc transfer

This draft studies a superconducting two-dimensional SSH model with a finite impurity wall used as a tunable internal boundary.

The current story has two main results:

  • In the imposed-pairing BdG problem, the tracked Weyl-arc branch transfers from a bulk-scale excitation to a near-zero hard-wall branch as the wall strength is increased.
  • In the self-consistent mean-field problem, the same wall suppresses the local Gor’kov field and expels |\Delta_{AB}| from the wall while leaving the off-wall condensate finite.
Fixed pairing

Weyl-arc transfer

The central figure tracks the same BdG branch by eigenvector overlap and normalizes the ky=0 branch motion into an order parameter for the soft-to-hard boundary transition.
Self-consistency

Wall suppression

The SCMFT result shows that the wall is not merely a quasiparticle scatterer; it also suppresses and redistributes the anomalous field.

QuantaLumin Workspace

You’re connecting to your QuantaLumin workspace on members.quantalumin.com.