A resistor model for quantum criticality: quasi one-dimensional organic conductors

TL;DR

This paper models the metallic transport in quasi-one-dimensional organic superconductors near a quantum critical point using a resistor network approach, successfully fitting experimental data and supporting the extended criticality hypothesis.

Contribution

It introduces a resistor model based on hot and cold regions of the Fermi surface to describe quantum critical transport in organic conductors.

Findings

Model fits experimental transport data well.

Supports the extended criticality scenario.

Provides a framework for understanding quantum critical behavior.

Abstract

We investigate the metallic transport in the organic superconductor (TMTSF)2PF6 under pressure within the framework of the spin density wave theory in the proximity of a Peierls quantum critical point (QCP). We use a simple transport model of hot and cold regions around the Fermi surface, driven by the proximity to the QCP in order to provide a template to fit the experimental results. Successful agreement with the data comforts the interpretation of extended criticality around the antiferromagnetic QCP in the normal phase of quasi one-dimensional organic superconductors.