Tunneling currents in ferromagnetic systems with multiple broken symmetries

Details Tunneling currents in ferromagnetic systems with multiple broken symmetries Tunneling currents in ferromagnetic systems with multiple broken symmetries

2006-09-13

arxiv.org/abs/cond-mat/0609314v2

Phys. Rev. B 75, 024508 (2007)

Physics

Condensed Matter

Superconductivity

Accepted for publication in Phys. Rev. B

Scientific paper

SHORTENED ABSTRACT: A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. In this paper, we consider the broken SU(2) (internal spin) symmetry of ferromagnetic systems coexisting with \textit{i)} the broken U(1) symmetry of superconductors and \textit{ii)} the broken spatial inversion symmetry induced by a Rashba term in a spin-orbit coupling Hamiltonian. In order to study the effect of these broken symmetries, we consider tunneling currents that arise in two different systems; tunneling junctions consisting of non-unitary spin-triplet ferromagnetic superconductors and junctions consisting of ferromagnets with spin-orbit coupling.

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