1106.3777 (I. V. Bobkova et al.)

Recovering of superconductivity in exchange fields exceeding Pauli
limiting field under spin-dependent quasiparticle distribution    [PDF]

I. V. Bobkova, A. M. Bobkov

We study theoretically the simultaneous influence of spin accumulation
potential $eV_\uparrow-eV_\downarrow$ and the Zeeman exchange field on singlet
superconductivity. It is shown that the pair-breaking effect of the Zeeman
field can be fully compensated by creation of the appropriate spin accumulation
potential in the superconductor. Moreover, superconductivity can be recovered
for exchange fields well exceeding the Pauli limiting field. It is proposed
that the effect can be experimentally realized on the basis of voltage biased
junction consisting of a thin superconducting film sandwiched between two half
metals.

View original: http://arxiv.org/abs/1106.3777