Superconductivity suppression of Ba0.5K0.5Fe2−2xM2xAs2 single crystals by substitution of transition metal (M = Mn, Ru, Co, Ni, Cu, and Zn)

J. Li; Y. F. Guo; S. B. Zhang; J. Yuan; Y. Tsujimoto; X. Wang; C. I. Sathish; Y. Sun; S. Yu; W. Yi; K. Yamaura; E. Takayama-Muromachiu; Y. Shirako; M. Akaogi; H. Kontani

doi:10.1103/PhysRevB.85.214509

Superconductivity suppression of Ba0.5K0.5Fe2−2xM2xAs2 single crystals by substitution of transition metal (M = Mn, Ru, Co, Ni, Cu, and Zn)

J. Li, Y. F. Guo, S. B. Zhang, J. Yuan, Y. Tsujimoto, X. Wang, C. I. Sathish, Y. Sun, S. Yu, W. Yi, K. Yamaura, E. Takayama-Muromachiu, Y. Shirako, M. Akaogi, H. Kontani

DOI 10.1103/PhysRevB.85.214509 · Physical Review B

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Abstract

We investigated the doping effects of magnetic and nonmagnetic impurities in single-crystalline p-type Ba0.5K0.5Fe2−2xM2xAs2 (M = Mn, Ru, Co, Ni, Cu, and Zn) superconductors. The superconductivity is maintained robustly with the impurity Ru, and weakly with the impurities Mn, Co, Ni, Cu, and Zn. However, the present Tc suppression rate of both magnetic and nonmagnetic impurities remains much lower than what was expected for the s±-wave model. The temperature dependence of resistivity data shows an obvious low-T upturn for the crystals doped with high levels of impurity, which is due to the occurrence of localization. Thus, the relatively weak Tc suppression effect from Mn, Co, Ni, Cu, and Zn is considered to be a result of localization rather than the pair-breaking effect in the s±-wave model.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ba0.5K0.5Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37.78	Pressure not reported	unknown
Ba0.5K0.5Fe1.922Mn0.078As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.53	Pressure not reported	unknown
Ba0.5K0.5Fe1.936Ru0.064As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37.14	Pressure not reported	unknown
Ba0.5K0.5Fe1.896Co0.104As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30.31	Pressure not reported	unknown
Ba0.5K0.5Fe1.922Ni0.078As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	26.75	Pressure not reported	unknown
Ba0.5K0.5Fe1.912Cu0.088As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	22.29	Pressure not reported	unknown
Ba0.5K0.5Fe1.92Zn0.08As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30.15	Pressure not reported	unknown