A precursor state to unconventional superconductivity in CeIrIn${_5}$

TL;DR

This study reveals a precursor state in CeIrIn${_5}$ characterized by changes in Hall mobility that occur before superconductivity, sharing similarities with the pseudogap phase in cuprate high-temperature superconductors.

Contribution

It provides evidence of a precursor state in CeIrIn${_5}$ with properties akin to the pseudogap phase, advancing understanding of unconventional superconductivity.

Findings

Presence of a low temperature coherent Kondo state.

Deviations from Kohler's rule and quadratic Hall angle dependence.

Identification of a precursor state preceding superconductivity.

Abstract

We present sensitive measurements of the Hall effect and magnetoresistance in CeIrIn${_5}$ down to temperatures of 50 mK and magnetic fields up to 15 T. The presence of a low temperature coherent Kondo state is established. Deviations from Kohler's rule and a quadratic temperature dependence of the cotangent of the Hall angle are reminiscent of properties observed in the high temperature superconducting cuprates. The most striking observation pertains to the presence of a \textit{precursor} state--characterized by a change in the Hall mobility--that appears to precede the superconductivity in this material, in similarity to the pseudogap in the cuprate high $T_c$ superconductors.