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

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

2007-10-26

arxiv.org/abs/0710.5011v1

Phys. Rev. Lett. 100, 137003 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 figures

Scientific paper

10.1103/PhysRevLett.100.137003

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.

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