Anisotropic resistance switching in hexagonal manganites

Xueyun Wang, Danni Yang, Hui Min Zhang, Chuangye Song, Jing Wang, Guotai Tan, Renkui Zheng, Shuai Dong, Sang Wook Cheong, Jinxing Zhang

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3 Scopus citations

Abstract

The distribution and manipulation of oxygen defects, including oxygen vacancies (Ov) and interstitial oxygen (Oi), directly results in modifications in a variety of emergent functionalities in transition metal oxides. This is applicable in nanoscale control, which is a key issue in data and energy storage devices, such as resistive switching memory. Among all the oxygen-defect-related topics, nanoscale oxygen defect migration paths have a direct impact on the performance of memory devices, and are intrinsically determined by the structural anisotropy. Here, we use layered single-crystalline ferroelectric, hexagonal manganites (h-REMnO3) to demonstrate Oi-migration-induced nanoscale manipulation of conductance in the ab plane. Conversely, this unique phenomenon cannot be achieved along the c axis. Furthermore, a density functional theory calculation reveals that the energy barriers are lower for planar migrations of Oi, when compared to out-of-plane migration, and are responsible for such anisotropic resistance switching.

Original languageEnglish (US)
Article number054106
JournalPhysical Review B
Volume99
Issue number5
DOIs
StatePublished - Feb 26 2019

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wang, X., Yang, D., Zhang, H. M., Song, C., Wang, J., Tan, G., Zheng, R., Dong, S., Cheong, S. W., & Zhang, J. (2019). Anisotropic resistance switching in hexagonal manganites. Physical Review B, 99(5), [054106]. https://doi.org/10.1103/PhysRevB.99.054106