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Development, characterization, and modeling of a TaOx ReRAM for a neuromorphic accelerator

ECS Transactions

Marinella, Matthew J.; Mickel, Patrick R.; Lohn, Andrew L.; Hughart, David R.; Bondi, Robert J.; Mamaluy, Denis M.; Hjalmarson, Harold P.; Stevens, James E.; Decker, Seth D.; Apodaca, Roger A.; Evans, Brian R.; Aimone, James B.; Rothganger, Fredrick R.; James, Conrad D.; DeBenedictis, Erik

Resistive random access memory (ReRAM), or memristors, may be capable of significantly improve the efficiency of neuromorphic computing, when used as a central component of an analog hardware accelerator. However, the significant electrical variation within a device and between devices degrades the maximum efficiency and accuracy which can be achieved by a ReRAMbased neuromorphic accelerator. In this report, the electrical variability is characterized, with a particular focus on that which is due to fundamental, intrinsic factors. Analytical and ab initio models are presented which offer some insight into the factors responsible for this variability.

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Development, characterization, and modeling of a TaOx ReRAM for a neuromorphic accelerator

ECS Transactions

Marinella, Matthew J.; Mickel, Patrick R.; Lohn, Andrew L.; Hughart, David R.; Bondi, Robert J.; Mamaluy, Denis M.; Hjalmarson, Harold P.; Stevens, James E.; Decker, Seth D.; Apodaca, Roger A.; Evans, Brian R.; Aimone, James B.; Rothganger, Fredrick R.; James, Conrad D.; DeBenedictis, Erik

Resistive random access memory (ReRAM), or memristors, may be capable of significantly improve the efficiency of neuromorphic computing, when used as a central component of an analog hardware accelerator. However, the significant electrical variation within a device and between devices degrades the maximum efficiency and accuracy which can be achieved by a ReRAMbased neuromorphic accelerator. In this report, the electrical variability is characterized, with a particular focus on that which is due to fundamental, intrinsic factors. Analytical and ab initio models are presented which offer some insight into the factors responsible for this variability.

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Correlation of charge transport to intrinsic strain in silicon oxynitride and Si-rich silicon nitride thin films

Proposed for publication in Applied Physics Letters.

Habermehl, Scott D.; Apodaca, Roger A.

Poole-Frenkel emission in Si-rich nitride and silicon oxynitride thin films is studied in conjunction with compositional aspects of their elastic properties. For Si-rich nitrides varying in composition from SiN{sub 1.33} to SiN{sub 0.54}, the Poole-Frenkel trap depth ({Phi}{sub B}) decreases from 1.08 to 0.52 eV as the intrinsic film strain ({Epsilon}{sub i}) decreases from 0.0036 to -0.0016. For oxynitrides varying in composition from SiN{sub 1.33} to SiO{sub 1.49}N{sub 0.35}, {Phi}{sub B} increases from 1.08 to 1.53 eV as {Epsilon}{sub i} decreases from 0.0036 to 0.0006. In both material systems, a direct correlation is observed between {Phi}{sub B} and {Epsilon}{sub i}. Compositionally induced strain relief as a mechanism for regulating {Phi}{sub B} is discussed.

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11 Results
11 Results