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Electron wavefunctions are switched spatially from one quantum well to another by varying the gate voltage Vg in spatial wavefunction-switched (SWS) field-effect transistors (FETs), which comprise two or more coupled quantum wells serving as the transport channel. This is shown for Si/SiGe and InGaAs/AlInAs quantum well systems. The presence of charge in a particular well or channel is used to encode...
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