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Essay On Spin Field Effect Transistor

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Spin is one of the most intriguing quantum properties carried by elementary particles. Incorporation of electron spin into the operation of semiconductor devices enables novel functionalities and increased performance for information processing and metrology. (-- removed HTML --) (-- removed HTML --) 1,2 (-- removed HTML --) (-- removed HTML --) Among the most promising spin-based semiconductor devices is the spin field effect transistor (spinFET), (-- removed HTML --) (-- removed HTML --) 3 (-- removed HTML --) (-- removed HTML --) considered a future candidate for high performance digital computing and memory with ultralow energy needs. (-- removed HTML --) (-- removed HTML --) 4 (-- removed HTML --) (-- removed HTML --) (--…show more content…
(-- removed HTML --) (-- removed HTML --) 9 (-- removed HTML --) (-- removed HTML --) Recognizing spin dephasing in a 2D channel as a limiting factor for a spinFET, it was proposed in Ref. (-- removed HTML --) 10 (-- removed HTML --) to eliminate dephasing by tuning the Rashba and Dresselhaus couplings such that the effects of spin orbit coupling are effectively canceled. The model becomes then analytically solvable and there is no dephasing. Although the tuning of Rashba and Dresselhaus coupling has been demonstrated experimentally, (-- removed HTML --) (-- removed HTML --) 11 (-- removed HTML --) (-- removed HTML --) these experiments involved complex structures of multiple quantum wells, not compatible with typical III-V 2D channel FETs, for which the Rashba effect is generally recognized as dominant over the Dresselhaus coupling. (-- removed HTML --) (-- removed HTML --) 5 (-- removed HTML --) (-- removed HTML --) (-- removed HTML --) (-- removed HTML --) The objective of this paper is to study the non-equilibrium spin transport in a 25 nm gate length In (-- removed HTML --) 0.3 (-- removed HTML --) Ga (-- removed HTML --) 0.7 (-- removed HTML --) As field-effect transistor (FET) as an example of a realistic device, the structure of which is shown in Fig. (-- removed HTML --) 1 (-- removed HTML --) . The study is carried out by
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