Spin fluctuations and superconductivity in layered f-electron superlattices

Yasuhiro Tada; Robert Peters

doi:10.1103/PhysRevB.92.035129

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Spin fluctuations and superconductivity in layered f-electron superlattices

Yasuhiro Tada, Robert Peters

DOI 10.1103/PhysRevB.92.035129 · Physical Review B

T1

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Abstract

We investigate magnetic and superconducting properties of layered f-electron superlattices within the fluctuation exchange approximation (FLEX). We show that spin fluctuations, which are characterized by the maximum value of the spin susceptibility in the three-dimensional (3D) Brillouin zone, are strongly suppressed in f-electron superlattices. However, effective 2D spin fluctuations can be increased due to the spatial confinement of the f electrons. Therefore the tendency towards dx2−y2-wave superconductivity, mediated by these spin fluctuations, can be strongly increased in f-electron superlattices. This is in sharp contrast to superlattices composed of conventional s-wave superconductors, where superconductivity is generally suppressed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeIn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.3	Pressure not reported	onset