摘要
The spin field-effect transistor envisioned by Datta and Das opens a gateway to spin information processing. Although the coherent manipulation of electron spins in semiconductors is now possible, the realization of a functional spin field-effect transistor for information processing has yet to be achieved, owing to several fundamental challenges such as the low spin-injection efficiency due to resistance mismatch, spin relaxation and the spread of spin precession angles. Alternative spin transistor designs have therefore been proposed, but these differ from the field-effect transistor concept and require the use of optical or magnetic elements, which pose difficulties for incorporation into integrated circuits. Here, we present an all-electric and all-semiconductor spin field-effect transistor in which these obstacles are overcome by using two quantum point contacts as spin injectors and detectors. Distinct engineering architectures of spin-orbit coupling are exploited for the quantum point contacts and the central semiconductor channel to achieve complete control of the electron spins (spin injection, manipulation and detection) in a purely electrical manner. Such a device is compatible with large-scale integration and holds promise for future spintronic devices for information processing.
原文 | English |
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頁(從 - 到) | 35-39 |
頁數 | 5 |
期刊 | Nature Nanotechnology |
卷 | 10 |
發行號 | 1 |
DOIs | |
出版狀態 | Published - 2015 1月 1 |
All Science Journal Classification (ASJC) codes
- 生物工程
- 原子與分子物理與光學
- 生物醫學工程
- 一般材料科學
- 凝聚態物理學
- 電氣與電子工程