Datta-Das transistor: Significance of channel direction, size dependence of source contacts, and boundary effects

Ming Hao Liu, Ching Ray Chang

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

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.

原文English
文章編號205301
期刊Physical Review B - Condensed Matter and Materials Physics
73
發行號20
DOIs
出版狀態Published - 2006 五月 2

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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