Theory of interplay of nuclear magnetism and superconductivity inAuIn2

1997/06/11 by M. L. Kulic, Miodrag L. Kulić, A. I. Buzdin +2 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Theoretical and Computational Physics #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.56.r11415

4 pages with 2 PS figures, RevTeX, submitted to Physical Review B - Rapid Communications

arxiv created 1997/06/11 · openalex publication_date 1997/11/01 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28

Abstract

The recently reported [S. Rehmann, T. Herrmannsd"orfer, and F. Pobel, Phys. Rev. Lett. 78, 1122 (1997)] coexistence of a nuclear magnetic order, with the critical temperature T_M=35 \ensuremathμK, and superconductivity, with the critical temperature T_S=207 mK, in AuIn₂ is studied theoretically. It is shown that superconducting (S) electrons and localized nuclear magnetic moments interact predominantly via the contact hyperfine interaction, giving rise to a spiral or domainlike magnetic order in the superconducting phase depending on the strength of magnetic anisotropy. In clean samples (l>\ensuremathξ₀) of AuIn₂ the oscillatory magnetic order should produce a line of nodes in the quasiparticle spectrum of S electrons. The critical field H_c(T=0) in the coexistence phase is reduced by a factor of 2 with respect to its bare value.

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