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Ballistic spin transport in a two-dimensional electron gas

Tang, H. X. and Monzon, F. G. and Lifshitz, Ron and Cross, M. C. and Roukes, M. L. (2000) Ballistic spin transport in a two-dimensional electron gas. Physical Review B, 61 (7). pp. 4437-4440. ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:TANprb00

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Abstract

We explore electrically injected, spin-polarized transport in a ballistic two-dimensional electron gas. We augment the Büttiker-Landauer picture with a simple, but realistic model for spin-selective contacts to describe multimode reservoir-to-reservoir transport of ballistic spin-1/2 particles. Clear and unambiguous signatures of spin transport are established in this regime, for the simplest measurement configuration that demonstrates them directly. These effects originate from spin precession of ballistic carriers; they exhibit a strong dependence upon device geometry, and vanish in the diffusive limit. Our results have important implications for prospective “spin transistor” devices.


Item Type:Article
Additional Information:©2000 The American Physical Society Received 28 July 1999 We gratefully acknowledge support from DARPA Spintronics, through ONR Grant No. N00014-96-1-0865. We also thank A. Polichtchouk and M. Hartl for contributions to this work.
Record Number:CaltechAUTHORS:TANprb00
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TANprb00
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.61.4437
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3307
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:26 May 2006
Last Modified:26 Dec 2012 08:53

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