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This paper presents multi-state quantum dot channel (QDC) FETs incorporating cladded quantum dots forming a novel superlattice (QDSL) as the transport channel. Harnessing QDSL mini-energy band transitions as well as the encoding of spatial location of carriers in the upper or lower quantum dot channels is utilized to obtain 8- and 16-logic states. Potentially, 32-logic states can be achieved by additionally incorporating QDSL between tunnel oxide and gate. This maybe an interim alternative to sub-milliKelvin Si/SiGe qubits.

The gate-all-around junctionless field-effect transistor (GAA JL FET)-based biosensor has recently attracted worldwide attention due to its good sensitivity to gate-all-around architecture and overall conduction mechanism. The effect of temperature usually affects the performance of transistors and sensors. Therefore, the impact of temperature on the 3D GAA JL FET-based biosensor has been investigated in this work. The dielectric modulation (DM) approach has been considered for including biomolecules. Consequently, the main proprieties of this biosensor have been investigated by ranging the temperature from 77 K to 400 K. The simulated results showed that the on-state current lowers as the temperature rises, but the off-state current increases. The off-current variation concerning the temperature is higher than the on-current change. Also, this type of biosensor appears to have a finer threshold voltage. Furthermore, the obtained results reveal that the current sensitivity is increased when ranging from temperature from 200 K to 400 K, and deteriorates for lower temperature values, like 100 K and 77 K. In addition, the GAA JL FET-based biosensor is more reliable for the detection of neutral biomolecules at high temperatures.