The importance of miniaturization: electronic phenomena at the nanoscale 小型化的重要性:纳米世界的电子现象
Multiple research articles fabricate large electronic devices (with lateral sized 大于10 µm2) and claim that the behaviors observed are “promising” for applications like data storage or computing. Such claims are highly misleading because those technologies employ ultra-scaled electronic devices (e.g., transistors, memristors) with lateral sizes 小于0.01 µm2. In small-size devices, the number of local defects in the materials can be remarkably different, which almost always affects switching voltages, energies and times, as well as state resistances may be remarkably different than in larger devices, which also affects yield, variability and reliability. Hence, the fact that a large device (大于10 µm2) shows whatever performance does not imply that a small device (小于0.01 µm2) with identical materials composition will also exhibit it. In this seminar, I will show multiple methods to characterize the electronic properties of different materials and devices at the nanoscale. I will describe some of the properties I have analyzed in metal-oxides, graphene, molybdenum disulfide, hexagonal boron nitride, and nanowires. I will describe the setups that I have developed in order to carry out these studies, with special emphasis in conductive atomic force microscopy. The main properties that I will discuss are related to leakage current, dielectric breakdown and resistive switching in thin dielectrics, as well as piezoelectricity in two-dimensional materials and nanowires.
厂商其他视频
Single-molecule chemical reactions probed by Atomic Force Microscopy 原子力显微镜下的单分子化学反应
Visualizing fractional excitations in a Tomonaga-Luttinger liquid
Scanning probe lithography for bottom-up built biomimetic nanostructures 用于自下而上构建仿生纳米结构的扫描探针刻蚀
Materials under the tip: Quantitative imaging of localized functionalities at the nanoscale 探针材料:纳米尺度局部功能的定量成像
Electronic properties of 2D ferroelectric layer based FET's using Kelvin – probe force microscopy 开尔文探针力显微镜下的2D铁电层场效应晶体管的电子特性
Atomic insights into the interfacial ion-water interaction 离子-水界面相互作用的原子洞察
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