Browsing by Author "Wami, Shiferaw"
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Item Simulation of Three-Layer Solid State Memcapacitor(Addis Ababa Universty, 2010-06) Wami, Shiferaw; Bekele, Mulugeta (PhD)Memcapacitors are capacitors whose capacitance depends on the past states through which the system has evolved. The focus of this thesis is on the possible realization of a three-layer solid-state memory capacitive (memcapacitive) system. The functioning of this device is based on the slow polarization rate of a medium between plates of a regular capacitor. To achieve this goal, this work considers a three-layer structure embedded in a capacitor. The three layer structure is formed by metallic layers separated by an insulator so that non-linear electronic transport between the layers can occur. Unlike conventional capacitor, the capacitance of this device depends on the history of the system. Our calculation shows non-pinched hysteretic charge-voltage and capacitance-voltage curves, and both negative and diverging capacitance within certain ranges of the field. This property of memcapacitive system makes it a good candidate for non-volatile memory application.