Superconductivity in ferromagnetic RuSr2GdCu2O8

Jian-Xin Zhu; C. S. Ting; C. W. Chu

doi:10.1103/PhysRevB.62.11369

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Superconductivity in ferromagnetic RuSr2GdCu2O8

Jian-Xin Zhu, C. S. Ting, C. W. Chu

DOI 10.1103/PhysRevB.62.11369 · Physical Review B

T1

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Abstract

The phase diagram of temperature versus exchange field is obtained within a BCS model for d-wave superconductivity in CuO2 layers which is coupled to ferromagnetic RuO2 layers in RuSr2GdCu2O8. It is found that the Fulde-Ferrell-Larkin-Ovchinnikov state is very sensitive to the band filling factor. For strong exchange field, we point out that superconductivity could only exist in the interfaces between ferromagnetic domains. The magnetization curve is calculated and its comparison with experiment is discussed. We also propose the measuring of tunneling conductance near a single unitary impurity to detect the strength of the exchange interaction.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	47	Pressure not reported	onset
RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	16	Pressure not reported	unknown
R1.5Ce0.5RuSr2Cu2O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown