Superconductivity in the Presence of Strong Pauli Paramagnetism: CeCu2Si2

Steglich, F.; Aarts, J.; Bredl, C. D.; Lieke, W.; Meschede, D.; Franz, W.; Schäfer, H.

doi:10.1103/PhysRevLett.43.1892

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Superconductivity in the Presence of Strong Pauli Paramagnetism: CeCu₂Si₂

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Citation

Steglich, F., Aarts, J., Bredl, C. D., Lieke, W., Meschede, D., Franz, W., et al. (1979). Superconductivity in the Presence of Strong Pauli Paramagnetism: CeCu₂Si₂. Physical Review Letters, 43(25), 1892-1896. doi:10.1103/PhysRevLett.43.1892.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-BFC0-C

Abstract

A comparison was made between four low-temperature properties of LaCu2Si2 and CeCu2Si2. Whereas LaCu2Si2 behaves like a normal metal, CeCu2Si2 shows (i) low-temperature anomalies typical of "unstable 4f shell" behavior and (ii) a transition into a superconducting state at Tc≃0.5 K. Our experiments demonstrate for the first time that superconductivity can exist in a metal in which many-body interactions, probably magnetic in origin, have strongly renormalized the properties of the conduction-electron gas.