2014
DOI: 10.1038/srep03806
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Multi-Valued Logic Gates based on Ballistic Transport in Quantum Point Contacts

Abstract: Multi-valued logic gates, which can handle quaternary numbers as inputs, are developed by exploiting the ballistic transport properties of quantum point contacts in series. The principle of a logic gate that finds the minimum of two quaternary number inputs is demonstrated. The device is scalable to allow multiple inputs, which makes it possible to find the minimum of multiple inputs in a single gate operation. Also, the principle of a half-adder for quaternary number inputs is demonstrated. First, an adder th… Show more

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Cited by 16 publications
(19 citation statements)
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“…Zoom-in view of the lattice fringes and fast Fourier transformed images suggest that both the partially and fully developed conductive filaments consist of hexagonal hafnium showing (002) crystal plane with the d-spacing of 0.25 nm. [48] Atomic-level reconfiguration of the conductive filament and APC structure also allows ultrafast and low power operation, as documented in the literatures, [4,10,49] for very large-scale integrated circuit applications. The high melting point of hafnium is also responsible for the much enhanced retention of quantized conductance states in the present device.…”
Section: Resultsmentioning
confidence: 97%
“…Zoom-in view of the lattice fringes and fast Fourier transformed images suggest that both the partially and fully developed conductive filaments consist of hexagonal hafnium showing (002) crystal plane with the d-spacing of 0.25 nm. [48] Atomic-level reconfiguration of the conductive filament and APC structure also allows ultrafast and low power operation, as documented in the literatures, [4,10,49] for very large-scale integrated circuit applications. The high melting point of hafnium is also responsible for the much enhanced retention of quantized conductance states in the present device.…”
Section: Resultsmentioning
confidence: 97%
“…For multi-value logic this transfer function contains plateaus that presents a relatively stable output even if the input value varies slightly [5]. These plateaus appear as discrete ranges that can be used to represent logic states.…”
Section: Device Characteristicsmentioning
confidence: 99%
“…For multi-level logic, this transfer function contains plateaus that presents a relatively stable output even if the input value varies slightly [15]. These plateaus appear as discrete ranges that can be used to represent logic states.…”
Section: Modulating Error Resiliencementioning
confidence: 99%
“…Many such technologies present new features, which provide opportunities to develop new computer systems. Multi-level devices are one such common feature [3][4][5] that is already employed by several commercial memory technologies, e.g., in multi-level flash [6] and phase change memory [7]. Multilevel devices increase the on-chip information density, as they are capable of representing more than two distinct logical levels.…”
Section: Introductionmentioning
confidence: 99%