Magnetism and Superconductivity in (RE)Ni2B2C: The Case of TmNi2B2C

Details Magnetism and Superconductivity in (RE)Ni2B2C: The Case of TmNi2B2C Magnetism and Superconductivity in (RE)Ni2B2C: The Case of TmNi2B2C

1997-07-02

arxiv.org/abs/cond-mat/9707024v1

Physics

Condensed Matter

Superconductivity

12 pages with 2 PS figures, RevTeX

Scientific paper

10.1016/S0375-9601(97)00568-9

The recently reported coexistence of an oscillatory magnetic order with the wave vector Q=0.241 \AA^{-1} and superconductivity in TmNi2B2C is analyzed theoretically. It is shown that the oscillatory magnetic order and superconductivity interact predominantly via the exchange interaction between localized moments (LM's) and conduction electrons, while the electromagnetic interaction between them is negligible. In the coexistence phase of the clean TmNi2B2C the quasiparticle spectrum should have a line of zeros at the Fermi surface, giving rise to the power law behavior of thermodynamic and transport properties. Two scenarios of the origin of the oscillatory magnetic order in TmNi2B2C are analyzed: a) due to superconductivity and b) independently on superconductivity. Experiments in magnetic field are proposed in order to choose between them.

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