2000/10/31 by R. Mélin
Materials Science · Physics and Astronomy · #Condensed matter physics #Cooper pair #Electrode #Electron #Electron pair #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Materials science #Nanotechnology #Physics #Physics of Superconductivity and Magnetism #Proximity effect (electron beam lithography) #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Superconductivity #Superposition principle #Thermodynamics #cond-mat.mes-hall
paper · pdf · doi:10.1088/0953-8984/13/30/301
4 pages, RevTex
arxiv created 2001/05/30 · openalex publication_date 2001/07/12 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
It is demonstrated that non-local Cooper pairs can propagate in ferromagnetic electrodes with opposite spin orientations. In the presence of such cross-correlations, the superconducting gap is found to depend explicitly on the relative orientation of the ferromagnetic electrodes. Non-local Cooper pairs can in principle be probed by means of direct-current (dc) transport. For two ferromagnetic electrodes, we propose a `quantum switch' that can be used to detect correlated pairs of electrons. For three or more ferromagnetic electrodes, the Cooper pair-like state is a linear superposition of Cooper pairs which could be detected in the dc transport. The effect also induces an enhancement of the ferromagnetic proximity effect on the basis of superconducting cross-correlations propagating along domain walls.