Semi-Holographic Fermi Liquids

TL;DR

This paper introduces a semi-holographic framework that captures the universal physics of holographic non-Fermi liquids, enabling generalizations like dynamical exponents and impurity effects, and explores deformations and UV matching.

Contribution

It presents a semi-holographic model unifying holographic non-Fermi liquids with broader applicability and analyzes relevant deformations and UV matching.

Findings

Semi-holographic description reproduces key features of holographic non-Fermi liquids.

Framework allows incorporation of lattice, impurity, and spin-orbit effects.

Discussion of relevant deformations and UV theory matching.

Abstract

We show that the universal physics of recent holographic non-Fermi liquid models is captured by a semi-holographic description, in which a dynamical boundary field is coupled to a strongly coupled conformal sector having a gravity dual. This allows various generalizations, such as a dynamical exponent and lattice and impurity effects. We examine possible relevant deformations, including multi-trace terms and spin-orbit effects. We discuss the matching onto the UV theory of the earlier work, and an alternate description in which the boundary field is integrated out.