The Larmor clock and anomalous spin dephasing in silicon
- Resource Type
- Working Paper
- Authors
- Huang, Biqin; Appelbaum, Ian
- Source
- Phys. Rev. B Rapid Comm. 82 241202(R) (2010)
- Subject
- Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics
- Language
Drift-diffusion theory - which fully describes charge transport in semiconductors - is also universally used to model transport of spin-polarized electrons in the presence of longitudinal electric fields. By transforming spin transit time into spin orientation with precession (a technique called the "Larmor clock") in current-sensing vertical-transport intrinsic Si devices, we show that spin diffusion (and concomitant spin dephasing) can be greatly enhanced with respect to charge diffusion, in direct contrast to predictions of spin Coulomb-drag diffusion suppression.
Comment: minor edits and updated refs