Tunable thermal conductivity in aluminum oxide resistive based switching structures by conducting filament diffusion

Dae Yun Kang, Won Yong Lee, No Won Park, Yo Seop Yoon, Gil Sung Kim, Tae Geun Kim, Sang Kwon Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nanoscale oxide resistive switching structures have attracted widespread attention in connection with future logic, memory, neuromorphic computing, and storage structure applications. Resistive switching effects are usually assumed to be caused by conducting filaments (CFs), which are formed by metal diffusion, and their breaking across the insulating oxide between the metal electrodes. Understanding thermal transport in CF containing metal/oxide based structures is critical to determine whether these filaments exist. This paper reports phonon transport in Cu diffused aluminum oxide (AO) in a Cu/AO/Si resistive switching structure where Cu based CFs have formed locally as a result of electric breakdown. This was studied by measuring cross-plane thermal conductivity on CF containing AO layers from 100 to 500 K. Our results suggest that conferring thermal properties upon non-thermoelectric materials as a result of CF formation enables thermal conductivity to be controlled by CF density. Therefore, the proposed methodology, including a local probing method, will also help understand other physical properties of metal/oxide based resistive switching structures in the future.

Original languageEnglish
Pages (from-to)992-1000
Number of pages9
JournalJournal of Alloys and Compounds
Volume790
DOIs
Publication statusPublished - 2019 Jun 25

Keywords

  • 3-Omega method
  • Conducting filament
  • Cross-plane thermal conductivity
  • Phonon scattering
  • Phonon transport
  • Resistive switching structures

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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