Spin susceptibility of noncentrosymmetric heavy-fermion superconductor CeIrSi3 under pressure: Si29 knight-shift study on single crystal

H. Mukuda, T. Ohara, M. Yashima, Y. Kitaoka, R. Settai, Y. Onuki, K. M. Itoh, E. E. Haller

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We report Si29 NMR study on a single crystal of the heavy-fermion superconductor CeIrSi3 without an inversion symmetry along the c axis. The Si29 Knight-shift measurements under pressure have revealed that the spin susceptibility for the ab plane decreases slightly below Tc, whereas along the c axis it does not change at all. The result can be accounted for by the spin susceptibility in the superconducting state being dominated by the strong antisymmetric (Rashba-type) spin-orbit interaction that originates from the absence of an inversion center along the c axis and it being much larger than superconducting condensation energy. This is the first observation which exhibits an anisotropy of the spin susceptibility below Tc in the noncentrosymmetric superconductor dominated by strong Rashba-type spin-orbit interaction.

Original languageEnglish
Article number017002
JournalPhysical review letters
Volume104
Issue number1
DOIs
Publication statusPublished - 2010 Jan 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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