CUED Publications database

Nanoscale Plasmon-Enhanced Spectroscopy in Memristive Switches.

Di Martino, G and Tappertzhofen, S and Hofmann, S and Baumberg, J (2016) Nanoscale Plasmon-Enhanced Spectroscopy in Memristive Switches. Small, 12. pp. 1334-1341.

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Resistive switching memories are nonvolatile memory cells based on nano-ionic redox processes and offer prospects for high scalability, ultrafast write and read access, and low power consumption. In two-terminal cation based devices a nanoscale filament is formed in a switching material by metal ion migration from the anode to the cathode. However, the filament growth and dissolution mechanisms and the dynamics involved are still open questions, restricting device optimization. Here, a spectroscopic technique to optically characterize in situ the resistive switching effect is presented. Resistive switches arranged in a nanoparticle-on-mirror geometry are developed, exploiting the high sensitivity to morphological changes occurring in the tightly confined plasmonic hotspot within the switching material. The focus is on electrochemical metallization and the optical signatures detected over many cycles indicate incomplete removal of metal particles from the filament upon RESET and suggest that the filament can nucleate from different positions from cycle to cycle. The technique here is nondestructive and the measurements can be easily performed in tunable ambient conditions and with realistic cell geometries.

Item Type: Article
Uncontrolled Keywords: RRAM electrochemistry memristive switches plasmonics spectroscopy switches
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:28
Last Modified: 21 Jul 2018 20:11