Datta-Das transistor: Significance of channel direction, size-dependence of source contacts, and boundary effects
| dc.creator | Liu, Ming-Hao | |
| dc.creator | Chang, Ching-Ray | |
| dc.date | 2005-07-21 | |
| dc.date | 2006-04-18 | |
| dc.date.accessioned | 2026-07-07T06:41:24Z | |
| dc.date.available | 2026-07-07T06:41:24Z | |
| dc.description | We analyze the spin expectation values for injected spin-polarized electrons (spin vectors) in a [001]-grown Rashba-Dresselhaus two-dimensional electron gas (2DEG). We generalize the calculation for point spin injection in semi-infinite 2DEGs to finite-size spin injection in bounded 2DEGs. Using the obtained spin vector formula, significance of the channel direction for the Datta-Das transistor is illustrated. Numerical results indicate that the influence due to the finite-size injection is moderate, while the channel boundary reflection may bring unexpected changes. Both effects are concluded to decrease when the spin-orbit coupling strength is strong. Hence [110] is a robust channel direction and is therefore the best candidate for the design of the Datta-Das transistor. | |
| dc.description | 5 pages, 4 figures, accepted for publication in Physical Review B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0507495 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0507495 | |
| dc.identifier | Phys. Rev. B 73, 205301 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.73.205301 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/101652 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Datta-Das transistor: Significance of channel direction, size-dependence of source contacts, and boundary effects | |
| dc.type | text |