When 10:30 AM - 11:30 AM Feb 26, 2021
Where Virtual
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"Materials, Interfaces and Processes - a Different Perspective on Neuromorphic Computing"

Professor Ilia Valov
Peter Grunberg Institute, Aachen, Germany

Memristive cells and devices are essential building units for future nanoelectronic architectures targeting alternative data processing paradigms such as cognitive/neuromorphic computing and alternative logic operations, all being milestones in assembles of global networks such as Internet of Things (IoT) and creation of artificial intelligence (AI). Memristive devices demonstrate multiple functionalities, such as non-volatile memory and selector functions, ability to transit from digital to analog data storage and processing, sensor activities etc.  They are extremely stable against high energy particles and electromagnetic waves, thus preventing soft errors and can operate in a unprecedently broad temperature range from 4 K to 600 K making their application in space technologies and in general application under harsh conditions highly desirable. In the recent years, the application of memristive devices evidenced remarkable progress in areas of downscaling, pattern/face recognition, integration in chips, arrays and complex architectures.

The presentation will provide a different perspective on the progress and developments in the field, based on materials properties, interface interactions, formation of space charge layers and electrochemical redox reactions. A special attention will be focused on the relation materials’ properties – device performance. The criteria for materials selection will be discussed based on the specifics of the underlying physicochemical processes responsible for the memristive/neuromorphic behavior. Factors such as ionic/electronic conductivity of the solid electrolytes, transference numbers, electrocatalytic activities of active and inert electrodes, effects of moisture, interfaces, corrosion and electrode-electrolyte interactions will be shown to be determining the choice of particular materials system. The influence of impurities and doping elements in the solid electrolyte matrix on the electronic properties and device performance will be discussed. The importance in understanding the relation between materials properties and device performance will be highlighted.