Donor-induced performance tuning of amorphous SrTiO3 memristive nanodevices: Multistate resistive switching and mechanical tunability

Hussein Nili, Sumeet Walia, Ahmad Esmaielzadeh Kandjani, Rajesh Ramanathan, Philipp Gutruf, Taimur Ahmed, Sivacarendran Balendhran, Vipul Bansal, Dmitri B. Strukov, Omid Kavehei, Madhu Bhaskaran, Sharath Sriram

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Metal-oxide valence-change memristive devices are the key contenders for the development of multilevel nonvolatile analog memories and neuromorphic computing architectures. Reliable low energy performance and tunability of nonlinear resistive switching dynamics are essential to streamline the high-density circuit level integration of these devices. Here, manipulation of room temperature-synthesized defect chemistry is employed to enhance and tune the switching characteristics of high-performance amorphous SrTiO3 (a-STO) memristors. Substitutional donor (Nb) doping with low concentrations in the a-STO oxide structure allows extensive improvements in energy requirements, stability, and controllability of the memristive performance, as well as field-dependent multistate resistive switching. Evidence is presented that room temperature donor doping results in a modified insulator oxide where dislocation sites act as charge carrier modulators for low energy and multilevel operation. Finally, the performance of donor-doped a-STO-based memristive nanodevices is showcased, with the possibility of mechanical modulation of the nonlinear memristive characteristics of these devices demonstrated. These results highlight the potential of donor-doped a-STO nanodevices for high-density integration as analog memories and multifunctional alternative logic elements.

Original languageEnglish (US)
Pages (from-to)3172-3182
Number of pages11
JournalAdvanced Functional Materials
Volume25
Issue number21
DOIs
StatePublished - Jun 1 2015

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Keywords

  • donor doping
  • memristors
  • nanoscale resistive switching
  • niobium

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Nili, H., Walia, S., Kandjani, A. E., Ramanathan, R., Gutruf, P., Ahmed, T., Balendhran, S., Bansal, V., Strukov, D. B., Kavehei, O., Bhaskaran, M., & Sriram, S. (2015). Donor-induced performance tuning of amorphous SrTiO3 memristive nanodevices: Multistate resistive switching and mechanical tunability. Advanced Functional Materials, 25(21), 3172-3182. https://doi.org/10.1002/adfm.201501019