Fermi Surface under Magnetism Instability

TL;DR

This paper investigates how the Fermi surface evolves near quantum critical points using gauge/gravity duality, revealing a transition from a non-Fermi liquid with a Fermi surface to its disappearance in a nematic phase.

Contribution

It constructs a gravity dual model of a paramagnetic-nematic phase transition and analyzes the Fermi surface evolution across this quantum phase transition.

Findings

Existence of non-Fermi liquid with Fermi surface in paramagnetic phase

Disappearance of Fermi surface in nematic phase

Fermi surface evolution characterized near quantum criticality

Abstract

In this paper, we study the fermionic excitations near the quantum criticality using gauge/gravity duality. This is motivated by exploring the Fermi surface evolution near the quantum criticality. We construct the gravity dual of "paramagnetic-nematic" phase transition in a continuum limit and study the Fermi surface evolution across this quantum phase transition. We find that there exists non-Fermi liquid with the Fermi surface in the "paramagnetic" phase and the Fermi surface disappears in the "nematic" phase.