Mesoscopic competition of superconductivity and ferromagnetism: conductance peak statistics in metallic grains

Details Mesoscopic competition of superconductivity and ferromagnetism: conductance peak statistics in metallic grains Mesoscopic competition of superconductivity and ferromagnetism: conductance peak statistics in metallic grains

2008-02-07

arxiv.org/abs/0802.0901v1

Phys. Rev. Lett. 101, 207003 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.207003

We investigate the competition between superconductivity and ferromagnetism in chaotic ultra-small metallic grains in a regime where both phases can coexist. We use an effective Hamiltonian that combines a BCS-like pairing term and a ferromagnetic Stoner-like spin exchange term. We study the transport properties of the grain in the Coulomb blockade regime and identify signatures of the coexistence between pairing and exchange correlations in the mesoscopic fluctuations of the conductance peak spacings and peak heights.

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