Multifunctional Logic Gate by Means of Nano dot Array with Different Arrangements

Multifunctional logic gate devices consisting of a nano dot array are studied from the viewpoint of single electronics. In a nano dot array, the dots come in a random variety of sizes, which sometimes has a negative effect on the performance of electrical device applications. Here, this feature is used in a positive sense to achieve higher functionality in the form of flexible logic gates with low power consumption in which the variability of logic functions is guaranteed. Nano dot arrays with two input gates and one control gate in a variety of arrangements are considered, in which the two-input logic functions (such as NAND, NOR, or exclusive-OR (XOR) gates) are selected by changing the voltage applied to the control gate. To ensure the flexibility of the device, it is important to guarantee the performance with any one of the six important logic functions: NAND, AND, NOR, OR, XOR, and XNOR. We ran a selection simulation using a nano dot array consisting of six nano dots with different dot arrangements to clarify the relation between the variability of the logic functions and the dot arrangements.