Hole doping effect on superconductivity in Ce(Co1−xRux)In5
M. N. Ou, K. Gofryk, R. E. Baumbach, S. S. Stoyko, J. D. Thompson, J. M. Lawrence, E. D. Bauer, F. Ronning, A. Mar, Y. Y. Chen
DOI 10.1103/PhysRevB.88.195134 · Physical Review B
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Abstract
CeCoIn5, which has a superconducting transition temperature of 2.3 K, provides an excellent opportunity to study the interplay of superconductivity and magnetism near an antiferromagnetic quantum critical point. Previous studies have explored the effects of electron doping, magnetic field, and positive pressure on this system. To determine the effect of hole doping, we have grown single crystals of Ce(Co1−xRux)In5 in indium flux. The crystal structure of these Ru-doped samples was identified by powder XRD as the HoCoGa5-type. We find that the coherence temperature T* and the superconducting transition temperature Tc decrease monotonically with increasing Ru content. Unlike the case of hole doping in CeCo(In5−xCdx) alloys in which antiferromagnetism starts to emerge at x=0.025, we find no magnetic transition at our maximal nominal doping of xnom=0.5, where Tc is suppressed to 1.5 K. We discuss possible reasons for this difference between these two cases of hole doping.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | midpoint |
| Ce(Co1-xRux)In5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| CeIrIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.4 | Pressure not reported | unknown |
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