Work

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

Year: 2025

Type: article

Abstract: We report results of a study of strongly correlated d -wave superconducting slabs within a t - model solved using the statistically consistent Gutzwiller approach. For different dopings, we model slabs cut at 45 ∘ relative to the main crystallographic a b 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.

Source: Physical review. B./Physical review. B

DOI: 10.1103/5bl6-g7x4

Authors: A. Joki, M. Fogelström, T. Löfwander

Institutions: Chalmers University of Technology, Nordic Institute for Theoretical Physics, Stockholm University, KTH Royal Institute of Technology

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: European High Performance Computing Joint Undertaking, Vetenskapsrådet

Awards: Quantum Transport and Dynamics in Superconducting Quantum Materials, NAISS