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We realized lithographically-defined electrically-tunable silicon quantum dots (Si QDs) without unintentional localized potentials by improving device structures and fabrication techniques. Carrier density was tuned with a top gate and QD-potentials were controlled with the side gates. We succeeded in observing spin-related tunneling phenomena using the double QD device.
In this paper we present our recent attempts at developing the advanced information processing devices by integrating nano-electro-mechanical (NEM) structures into conventional silicon nanodevices. Firstly, we show high-speed and nonvolatile NEM memory which features a mechanically-bistable floating gate is integrated onto MOSFETs. Secondly we discuss hybrid systems of single-electron transistors...
We investigate novel serially-connected multiple single-electron transistors (MSETs) as a single-charge polarisation readout for silicon integrated charge qubits. We first design and analyse the double single-electron transistors (DSETs) in which double quantum dots are connected in series with two side gates. We show that the DSETs are sufficiently sensitive to distinguish all the single-charge polarisation...
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