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NRL scientists achieve high temperature milestone in silicon spintronics
Date:5/5/2011

s corresponding to both spin injection and extraction, and determine the corresponding spin lifetimes.

Electronic states can form at the contact interface and introduce deleterious effects for both charge and spin transport. These undesirable states can serve as traps which prevent propagation of either charge or spin in the silicon channel. In bulk silicon, the spin lifetime is known to depend upon the carrier density, and generally decreases as the electron density increases.. "In this study we show that the spin lifetime determined from our measurements changes systematically as one changes carrier concentration of the particular silicon sample used," adds Jonker. "Our results were obtained for a number of different carrier densities and show this trend, thus making it very clear that we obtain spin injection and accumulation in the silicon itself rather than in interface defect states." The result of this research rules out spin accumulation in interface states and demonstrates spin injection, accumulation and precession in the silicon channel.


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Contact: Daniel Parry
daniel.parry@nrl.navy.mil
202-767-2541
Naval Research Laboratory
Source:Eurekalert  

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