Direct demonstration of decoupling of spin and charge currents in nanostructures

• The notion of decoupling of spin and charge currents is one of the basic principles underlying the rapidly expanding field of spintronics. However, no direct demonstration of the phenomenon exists. We report a novel measurement in which a nonequilibrium spin population is created by a pointlike injection of current from a ferromagnet across a tunnel barrier into a one-dimensional spin channel and detected differentially by a pair of ferromagnetic electrodes placed symmetrically about the injection point. We demonstrate that the spin current is strictly isotropic about the injection point and, therefore, completely decoupled from the unidirectional charge current.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

Electric charge; Electric currents; Electrodes; Ferromagnetic materials; Nanostructures; Spin current; Spintronics; Nanostructured materials; nanomaterial; article; chemical model; chemistry; computer simulation; electricity; electrochemistry; electromagnetic field; evaluation; impedance; materials testing; methodology; radiation exposure; spin labeling; Computer Simulation; Electric Impedance; Electrochemistry; Electromagnetic Fields; Electrostatics; Materials Testing; Models

Chemical; Nanostructures; Spin Labels

Physics

Fysik

Publication and Content Type

ref (subject category)

art (subject category)