Deterministic conversion between memory and threshold resistive switching via tuning the strong electron correlation

Hai Yang Peng, Yong Feng Li, Wei Nan Lin, Yu Zhan Wang, Xing Yu Gao, Tao Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Intensive investigations have been launched worldwide on the resistive switching (RS) phenomena in transition metal oxides due to both fascinating science and potential applications in next generation nonvolatile resistive random access memory (RRAM) devices. It is noteworthy that most of these oxides are strongly correlated electron systems, and their electronic properties are critically affected by the electron-electron interactions. Here, using NiO as an example, we show that rationally adjusting the stoichiometry and the associated defect characteristics enables controlled room temperature conversions between two distinct RS modes, i.e., nonvolatile memory switching and volatile threshold switching, within a single device. Moreover, from first-principles calculations and x-ray absorption spectroscopy studies, we found that the strong electron correlations and the exchange interactions between Ni and O orbitals play deterministic roles in the RS operations.

Original languageEnglish (US)
Article number442
JournalScientific Reports
Volume2
DOIs
StatePublished - Jun 14 2012

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Deterministic conversion between memory and threshold resistive switching via tuning the strong electron correlation'. Together they form a unique fingerprint.

Cite this