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Strengthened correlations near [110] edges of d-wave superconductors in the t−J model with the Gutzwiller approximation

A. Joki1,*, M. Fogelström1,2, and T. Löfwander1

  • *Contact author: amborn@chalmers.se
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Phys. Rev. B 113, 024508 – Published 16 January, 2026

DOI: https://doi.org/10.1103/5bl6-g7x4

Abstract

We report results of a study of strongly correlated d-wave superconducting slabs within a t-J model solved using the statistically consistent Gutzwiller approach. For different dopings, we model slabs cut at 45∘ relative to the main crystallographic ab axes, i.e., [110] orientation, and conclude that quasiparticle charge is drawn to the edges. Thus, the correlations are locally strengthened, and a region near the edge is closer to the Mott- insulating state with reduced hopping amplitudes on the links. Superconductivity is locally weakened near the edges in the correlated state, and the spectral weight of zero-energy Andreev bound states is substantially reduced compared to weak coupling theory. The renormalization of the edge states leaves no room for an extended s-wave component to form for hole dopings ranging from strongly underdoped to slightly overdoped.

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Phys. Rev. B 113, 024508– Published 16 January, 2026
  • Received 12 July 2025
  • Revised 5 December 2025
  • Accepted 9 December 2025
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