United States

Resistive random access memory (ReRAM) is touted to replace Silicon based flash memory due to its low operating voltage, fast access speeds and the potential to scale down to nm range for ultra-high density storage. In addition, its ability to retain multi level resistance states makes it suitable for neuromorphic computing application. Here, we develop a cationic ReRAM with a sputtered MgO as the insulating layer. The Ag/MgO/Au ReRAM stack reveals a strong dependence of its resistive switching properties on the sputtering conditions of MgO. Due to the highly stable sputtered MgO, repeatable resistive switching memory is achieved with a low ON voltage of ~0.7V and memory window of ~ 1x 105. Limiting Ag diffusion through a top electrode modified W/Ag/MgO/Au stack significantly reduces the abruptness of resistive switching, thereby demonstrating analog switching capability. This phenomenon is evident in the improved linearity and symmetry of potentiation and depression weight modulation pulses, demonstrating ideal Hebbian synaptic learning rules.

Materials Challenges for Memory

Top electrode modulated ReRAM for improved electronic synapse performance

resistive

reram

neuromorphic


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The energy cost of storing and moving data is enormous, and is growing at such a rapid pace that within a few years the power demand may overwhelm some developed nations. Non-volatile memory (NVM) and neuromorphic computing are enabling critical advances in this area, but there are many scientific and technological challenges. This conference will cover the materials challenges of different memory technologies, from the fundamental processes and mechanisms, to industry perspectives on materials specifications and manufacturing.

poster

Rational design of redoxed-based memristive devices for novel computing paradigm

Ferroelectric control of Rashba states: towards non-volatile spintronics driven by ferroelectricity

Materials to memory: why and how

Analog memory: materials, devices, applications

An opportunity for magnetoelectrics in complex oxides: designing heterostructures at the atomic scale

Smart 2D materials: the new frontier

What does gender got to do with science

Phase change memory devices for electrical and optical in-memory computing

Operando methods for determining lithiation, switching-mechanisms and phase changes in electrochemical processes

Material challenges in ferroelectric memories

technical paper

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Top electrode modulated ReRAM for improved electronic synapse performance

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Rational design of redoxed-based memristive devices for novel computing paradigm

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