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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Spin susceptibility in superconductors without inversion symmetry

P A Frigeri1, D F Agterberg2 and M Sigrist1

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In materials without spatial inversion symmetry, the spin degeneracy of the conduction electrons can be lifted by an antisymmetric spin–orbit coupling. We discuss the influence of this spin–orbit coupling on the spin susceptibility of such superconductors, with a particular emphasis on the recently discovered heavy Fermion superconductor CePt3Si. We find that, for this compound (with tetragonal crystal symmetry) irrespective of the pairing symmetry, the stable superconducting phases would give a very weak change of the spin susceptibility for fields along the c-axis and an intermediate reduction for fields in the basal plane. We also comment on the consequences for the paramagnetic limiting in this material.


PACS

74.25.Ha Magnetic properties

74.70.Tx Heavy-fermion superconductors

74.20.Rp Pairing symmetries (other than s-wave)

71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

74.25.Dw Superconductivity phase diagrams

Subjects

Superconductivity

Condensed matter: electrical, magnetic and optical

Dates

Issue 1 (September 2004)

Received 26 May 2004

Published 2 September 2004



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