Abstract
In this work a preliminary pressure–temperature–composition phase diagram for the Ce 2 Rh ( 1 - x ) Ir x In 8 heavy-fermions (HF) materials is reported, built from pressure-dependent electrical resistivity ( ρ ( T ) ) measurements on single-crystalline samples. Although neither of the two end members is an ambient-pressure SC, a transition to a zero-resistance (ZR) state was found at ambient pressure ( T C ≈ 600 mK ) in a narrow Ir concentration range (around x = 0.5 ). Pressures not higher than 10 kbar are sufficient to suppress this ZR state for all measured concentrations, in contrast to the 115 materials.
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