|
HAIT Journal of Science and Engineering Volume 1, Issue 1, pp. 41-50 © 2004 Holon Academic Institute of Technology | |||||
| |||||
Nuclear ferromagnetism induced Fulde-Ferell-Larkin-Ovchinnikov stateAlexander M. Dyugaev1,2, Israel D. Vagner2,3,*, and
Peter Wyder2
1L.D. Landau Institute for Theoretical Physics, | 2 Kosygin str., Moscow 119334, Russia 2Grenoble High Magnetic Fields Laboratory, Max-Planck-Institute für Festkörperforschung and CNRS, 25 Avenue des Martyrs, BP166, F38042, Grenoble, Cedex 9, France 3RCQCE at Department of Communication Engineering, Holon Academic Institute of Technology, 52 Golomb Str., Holon 58102, Israel 2Corresponding author: vagner_i@hait.ac.il Received 4 April 2003
| 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 ferromagnetically ordered nuclear spins should manifest the FFLO (Fulde-Ferell-Larkin-Ovchinnikov) state. We outline that the optimal experimental conditions for observation of FFLO could be achieved by creation, via adiabatic nuclear demagnetisation, of the negative nuclear spin temperatures. In this case the nuclear polarisation points in the opposite to the external magnetic field direction and the electromagnetic part of the nuclear spin magnetisation compensates the external magnetic field, while the exchange part creates the nonhomogeneous superconducting order parameter.
|