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Journal of the Korean Physical Society

, Volume 60, Issue 7, pp 1087–1091 | Cite as

Unipolar resistance switching characteristics in a thick ZnO/Cu/ZnO multilayer structure

  • Tran Le
  • Hoang Cao Son Tran
  • Hieu Van Le
  • Tuan Tran
  • Cao Vinh Tran
  • Thanh Tan Vo
  • Mau Chien Dang
  • Sang Sub Kim
  • Jaichan Lee
  • Bach Thang PhanEmail author
Research Papers

Abstract

The resistance switching mechanism and the electrical conduction of thick Cu/ZnO/Cu/ZnO/Cu structures were investigated for various ZnO thicknesses (40, 80, 160, and 320 nm) when the thickness of the middle Cu layer was 2 nm. The ZnO films had a microstructure with columnar grains normal to the substrate. The switching voltages (VSET and VRESET) varied with the thickness of the ZnO layer. A symmetric electrode structure exhibited a unipolar resistance switching. The electrical transport of both high-resistance state (HRS) and low-resistance state (LRS) was Ohmic conduction, and the resistance switching mechanism was driven by the formation and the rupture of Cu conducting paths.

Keywords

Resistance switching Random access memory Sputtering ZnO 

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Copyright information

© The Korean Physical Society 2012

Authors and Affiliations

  • Tran Le
    • 1
  • Hoang Cao Son Tran
    • 1
  • Hieu Van Le
    • 2
  • Tuan Tran
    • 2
  • Cao Vinh Tran
    • 3
  • Thanh Tan Vo
    • 4
  • Mau Chien Dang
    • 5
  • Sang Sub Kim
    • 6
  • Jaichan Lee
    • 7
  • Bach Thang Phan
    • 8
    Email author
  1. 1.Faculty of Physics and Engineering PhysicsUniversity of Science, Vietnam National UniversityHoChiMinh CityVietnam
  2. 2.Faculty of Materials ScienceUniversity of Science, Vietnam National UniversityHoChiMinh CityVietnam
  3. 3.Laboratory of Advanced MaterialsUniversity of Science, Vietnam National UniversityHoChiMinh CityVietnam
  4. 4.University of Technical EducationHoChiMinh CityVietnam
  5. 5.Laboratory of NanotechnologyVietnam National UniversityHoChiMinh CityVietnam
  6. 6.School of Materials Science and EngineeringInha UniversityIncheonKorea
  7. 7.School of Advanced Materials Science and EngineeringSungkyunkwan UniversitySuwonKorea
  8. 8.Faculty of Materials Science and Laboratory of Advanced MaterialsUniversity of Science, Vietnam National UniversityHoChiMinh CityVietnam

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