The precursor state to superconductivity in CeIrIn${_5}$: Unusual scaling of magnetotransport

TL;DR

This study investigates the normal-state magnetotransport properties of CeIrIn${_5}$, revealing a precursor state to superconductivity that affects the Hall effect but not resistivity, indicating unique underlying physics.

Contribution

It uncovers a novel precursor state in CeIrIn${_5}$ that influences the Hall channel, challenging existing scaling laws in heavy fermion superconductors.

Findings

Modified Kohler's scaling breaks down before superconductivity onset.

A single-parameter, model-independent scaling of the Hall angle is observed.

The precursor state affects the Hall effect but not resistivity or Hall coefficient.

Abstract

We present an analysis of the normal-state Hall effect and magnetoresistance in the heavy fermion superconductor CeIrIn${_5}$. It is demonstrated that the modified Kohler's scaling--which relates the magnetoresistance to the Hall angle--breaks down prior to the onset of superconductivity due to the presence of a precursor state to superconductivity in this system. A model-independent, single-parameter scaling of the Hall angle governed solely by this precursor state is observed. Neither the Hall coefficient nor the resistivity exhibit this scaling implying that this precursor state preferentially influences the Hall channel.