Two Superconducting Phases in CeRh_1-xIr_xIn_5

Details Two Superconducting Phases in CeRh_1-xIr_xIn_5 Two Superconducting Phases in CeRh_1-xIr_xIn_5

2004-05-27

arxiv.org/abs/cond-mat/0405636v1

Phys. Rev. B 70, 020505(R) (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.70.020505

Pressure studies of CeRh_1-xIr_xIn_5 indicate two superconducting phases as a function of x, one with T_c >= 2 K for x < 0.9 and the other with T_c < 1.2 K for x > 0.9. The higher T_c phase, phase-1, emerges in proximity to an antiferromagnetic quantum-critical point; whereas, Cooper pairing in the lower T_c phase-2 is inferred to arise from fluctuations of a yet to be found magnetic state. The T-x-P phase diagram of CeRh_1-xIr_xIn_5, though qualitatively similar, is distinctly different from that of CeCu_2(Si_1-xGe_x)_2.

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