2014英特爾ISEF獲獎作品摘要 機器人與智能機器（人工智能）Intel Finalist Abstract Robotics and Intelligent Machines (AI)

獲獎作品基本信息

年份	2014
學科	機器人與智能機器 Robotics and Intelligent Machines
國家/州	United States of America

獲獎作品名稱

A Kinetic Monte Carlo Study of the Scalability and Variability of the Forming Voltage of Transition Metal Oxide ReRAMs

獲獎作品摘要

I developed a fast kinetic Monte Carlo (kMC) simulator and applied it to a study of the geometrical scaling and statistical properties of resistive random access memories (ReRAMs). These devices are under intense investigation because they are promising alternatives to flash-based nonvolatile memories, which are not expected to scale to dimensions below ~20nm. "Forming" is performed just after manufacturing to functionalize the ReRAM by creating a conductive filament whose resistance is then modulated to encode "0" or "1" memory states. Since forming is a one-time process and since the underlying physics is stochastic in nature, statistically meaningful experimental characterizations of filament formation are difficult to perform and are not available.

? ? ? ? ?I addressed this problem by developing a simulator that captures the unique physics of ReRAMs: strongly coupled ionic and electronic transport. I treat the electronic effects using equivalent resistor networks, and oxygen vacancy/ion effects using kMC. The distribution of vacancies determines the linear/nonlinear elements of the resistor network, and the heat generated by electron flow in this network determines the vacancy/ion generation rates in kMC. Using this simulator, I found that the critical voltage V_f at which the filament forms depends roughly linearly on device thickness and logarithmically on device width. I motivate the thickness dependence using an effective field argument, and then offer a plausible statistical argument to explain the width dependence. I also investigated the effects of (a) external temperature, (b) voltage ramp rate and (c) maximum current at forming on V_f and its variability.

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高中生科研學術活動 英特爾 Intel ISEF 簡介

英特爾國際科學與工程大獎賽，簡稱 "ISEF"，由美國 Society for Science and the Public（科學和公共服務協會）主辦，英特爾公司冠名贊助，是全球規模最大、等級最高的中學生的科研科創賽事。ISEF 的學術活動學科包括了所有數學、自然科學、工程的全部領域和部分社會科學。ISEF 素有全球青少年科學學術活動的“世界杯”之美譽，旨在鼓勵學生團隊協作，開拓創新，長期專一深入地研究自己感興趣的課題。

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英特爾 ISEF 學術活動詳細介紹

英特爾 ISEF 全程指導方案

· 數學 · 物理 · 化學 · 生物 · 計算機 · 工程 ·

學科簡介：機器人與智能機器 Robotics and Intelligent Machines

Studies in which the use of machine intelligence is paramount to reducing the reliance on human intervention.

Subcategories:

Biomechanics?(BIE):?Studies and apparatus which mimic the role of mechanics in biological systems.

Cognitive Systems?(COG):?Studies/apparatus that operate similarly to the ways humans think and process information. Systems that provide for increased interaction of people and machines to more naturally extend and magnify human expertise, activity, and cognition.

Control Theory?(CON):?Studies that explore the behavior of dynamical systems with inputs, and how their behavior is modified by feedback. ?This includes new theoretical results and the applications of new and established control methods, system modelling, identification and simulation, the analysis and design of control systems (including computer-aided design), and practical implementation.

Machine Learning?(MAC):?Construction and/or study of algorithms that can learn from data.

Robot Kinematics?(KIN):?The study of movement in robotic systems.

Other?(OTH):?Studies that cannot be assigned to one of the above subcategories.?If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.