Analysis of Functional Oxide based Selectors for Cross-Point Memories
| Autor: | Nicholas Jao, Ahmedullah Aziz, Sumeet Kumar Gupta, Suman Datta |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
business.industry Computer science Electrical engineering Oxide Design elements and principles 02 engineering and technology 021001 nanoscience & nanotechnology Topology 01 natural sciences Memory array chemistry.chemical_compound chemistry 0103 physical sciences Figure of merit Cross point Critical current Electrical and Electronic Engineering 0210 nano-technology business Leakage (electronics) Voltage |
| Zdroj: | IEEE Transactions on Circuits and Systems I: Regular Papers. 63:2222-2235 |
| ISSN: | 1558-0806 1549-8328 |
| Popis: | We present an extensive analysis of functional-oxide based selector devices for cross-point memories from the perspectives of materials through arrays. We describe the design constraints required for proper functionality of a cross-point array and translate these constraints to figures of merit for the selector materials. The proposed figures of merit, related to the resistivities of the functional oxide in the metallic and insulating states and the critical current densities for insulator-metal transitions, determine whether or not a functional oxide is suitable to be employed as a selector for a memory technology. Our analysis shows the importance of co-optimizing the selector length with the read/write voltages and establishes the range of these parameters for proper functionality. We also perform an extensive material space analysis for the selector, relating the selector properties to the achievable array metrics. For instance, we show that optimized memory array with single crystal VO $_{\mathrm {{2}}}$ based selector and spin-memory element achieves $\sim 25\mu \text {A}$ sense margin with ~ 30% read disturb margin and 40ns write time. The leakage in the half-accessed cell can be as low as $15\mu \text {W}$ . The design principles established in this work will provide guidelines for future exploration of functional oxides for selector applications as well as for the optimization of cross-point arrays. |
| Databáze: | OpenAIRE |
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