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Superconductivity in CeCu2Si2 Single Crystals

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Citation

Assmus, W., Herrmann, M., Rauchschwalbe, U., Riegel, S., Lieke, W., Spille, H., et al. (1984). Superconductivity in CeCu2Si2 Single Crystals. Physical Review Letters, 52(6), 469-472. doi:10.1103/PhysRevLett.52.469.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-C2B7-7
Abstract
CeCu2Si2 single crystals prepared with an excess of Cu exhibit low residual resistivity ρ0, low susceptibility χ, small unit-cell volume V, and bulk "heavy-fermion" superconductivity below 0.65 K, while crystals grown from stoichiometric melt show higher ρ0 and χ, larger V, but no superconductivity. CeCu2Si2 behaves as an s-state superconductor with strongly temperature-dependent pair breaking and almost isotropic Fermi surface.