Zhongyunshen Zhu, Anton E O Persson, Lars-Erik Wernersson
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引用次数: 0
Abstract
The integration of functional materials into electronic devices has become a key approach to extending Moore's law by increasing the functional density of electronic circuits. Here, we present a device technology based on ultrascaled ferroelectric, antiambipolar transistors (ferro-AAT) with robust negative transconductance, enabling a wide range of reconfigurable functionalities with applications in both the digital and analog domains. The device relies on the integration of a hafnia-based ferroelectric gate stack on a vertical nanowire tunnel field-effect transistor. Through intentional gate/source overlap and tunnel-junction engineering, we demonstrate enhanced antiambipolarity with a high negative transconductance that is reconfigurable using the nonvolatile remanent polarization of the ferroelectric. Experimental validation highlights the versatility of this ferro-AAT in two implementation scenarios: content addressable memory (CAM) for high-density data search and reconfigurable signal processing in analog circuits. As a single-transistor cell for CAMs, the ferro-AAT shows subpicojoule operation for one search with a compact footprint of ∼0.01 μm2. For single-transistor-based signal modulation, multistate reconfigurations and high power conversion (>95%) are achieved in the ferro-AAT, resulting in a significant reduction in the complexity of analog circuit design. Our results reveal that the distinctive device properties allow ferro-AATs to operate beyond conventional transistors with multiple reconfigurable functionalities, ultrascaled footprint, and low power consumption.
期刊介绍:
ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.