Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-11-23
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 5 figures, supplementary information
Scientific paper
10.1038/nphys1626
Understanding the flow of spins in magnetic layered structures has enabled an increase in data storage density in hard drives over the past decade of more than two orders of magnitude1. Following this remarkable success, the field of 'spintronics' or spin-based electronics is moving beyond effects based on local spin polarisation and is turning its attention to spin-orbit interaction (SOI) effects, which hold promise for the production, detection and manipulation of spin currents, allowing coherent transmission of information within a device. While SOI-induced spin transport effects have been observed in two- and three-dimensional samples, these have been subtle and elusive, often detected only indirectly in electrical transport or else with more sophisticated techniques. Here we present the first observation of a predicted 'spin-orbit gap' in a one-dimensional sample, where counter-propagating spins, constituting a spin current, are accompanied by a clear signal in the easily-measured linear conductance of the system.
Baldwin Kirk W.
Goldhaber-Gordon David
Hughes Taylor L.
Pfeiffer Loren N.
Picciotto Rafael de
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