Holographic Fermi arcs and a d-wave gap

TL;DR

This paper investigates how holographic models with d-wave order parameters produce anisotropic gaps and Fermi arcs, revealing temperature-dependent Fermi surface structures in strongly correlated systems.

Contribution

It demonstrates that a bulk Majorana coupling in holography can produce d-wave gaps and Fermi arcs, advancing understanding of high-temperature superconductor phenomenology.

Findings

Fermi surface becomes anisotropically gapped with a Majorana coupling.

At low temperatures, the gap shrinks to four nodal points.

At high temperatures, Fermi arcs emerge due to partial gapping.

Abstract

We study fermion correlators in a holographic superfluid with a d-wave (spin two) order parameter. We find that, with a suitable bulk Majorana coupling, the Fermi surface is anisotropically gapped. At low temperatures the gap shrinks to four nodal points. At high temperatures the Fermi surface is partially gapped generating four Fermi arcs.