Nuclear ferromagnetism induced Fulde-Ferell-Larkin-Ovchinnikov state

Details Nuclear ferromagnetism induced Fulde-Ferell-Larkin-Ovchinnikov state Nuclear ferromagnetism induced Fulde-Ferell-Larkin-Ovchinnikov state

2001-12-15

arxiv.org/abs/cond-mat/0112286v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

We present a theoretical study of the influence of the nuclear ferromagnetism on superconductivity in the presence of the electron-nuclear spin interaction. It is demonstrated that in some metals, e.g. Rh, W, the BCS condensate imbedded in a matrix of ferromagneticaly ordered nuclear spins should manifest the FFLO (Fulde-Ferel-Larkin-Ovchinniov) state. We outline that the optimal experimental conditions for observation of FFLO could be achieved by creation, via adiabatic nuclear demagnetization, of the negative nuclear spin temperatures. In this case the nuclear polarization points in the opposite to the external magnetic field direction and the electromagnetic part of the nuclear spin magnetization compensates the external magnetic field, while the exchange part creates the nonhomogeneous superconducting order parameter.

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