Two Superconducting Phases in CeRh_1-xIr_xIn_5
M. Nicklas, V. A. Sidorov, H. A. Borges, P. G. Pagliuso, J. L. Sarrao,, J. D. Thompson
TL;DR
This study identifies two distinct superconducting phases in CeRh_1-xIr_xIn_5, with different critical temperatures and origins, influenced by pressure and composition, revealing complex magnetic interactions.
Contribution
It uncovers the existence of two superconducting phases in CeRh_1-xIr_xIn_5 and characterizes their properties and phase diagram, highlighting differences from similar compounds.
Findings
Two superconducting phases with different T_c values.
Higher T_c phase near an antiferromagnetic quantum-critical point.
Distinct phase diagram compared to CeCu_2(Si_1-xGe_x)_2.
Abstract
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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