5 years ago

Interfacial Charge Engineering in Ferroelectric-Controlled Mott Transistors

Interfacial Charge Engineering in Ferroelectric-Controlled Mott Transistors
Xia Hong, Zhiyong Xiao, Hanghui Chen, Mark A. Koten, Jeffrey E. Shield, Peter A. Dowben, Le Zhang, Xuegang Chen, Xin Zhang
Heteroepitaxial coupling at complex oxide interfaces presents a powerful tool for engineering the charge degree of freedom in strongly correlated materials, which can be utilized to achieve tailored functionalities that are inaccessible in the bulk form. Here, the charge-transfer effect between two strongly correlated oxides, Sm0.5Nd0.5NiO3 (SNNO) and La0.67Sr0.33MnO3 (LSMO), is exploited to realize a giant enhancement of the ferroelectric field effect in a prototype Mott field-effect transistor. By switching the polarization field of a ferroelectric Pb(Zr,Ti)O3 (PZT) gate, nonvolatile resistance modulation in the Mott transistors with single-layer SNNO and bilayer SNNO/LSMO channels is induced. For the same channel thickness, the bilayer channels exhibit up to two orders of magnitude higher resistance-switching ratio at 300 K, which is attributed to the intricate interplay between the charge screening at the PZT/SNNO interface and the charge transfer at the SNNO/LSMO interface. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy studies of SNNO/LSMO heterostructures reveal about 0.1 electron per 2D unit cell transferred between the interfacial Mn and Ni layers, which is corroborated by first-principles density functional theory calculations. The study points to an effective strategy to design functional complex oxide interfaces for developing high-performance nanoelectronic and spintronic applications. Nonvolatile resistance modulation controlled by ferroelectric Pb(Zr,Ti)O3 gates is realized in Mott transistors based on Sm0.5Nd0.5NiO3 and Sm0.5Nd0.5NiO3/La0.67Sr0.33MnO3 channels, with the bilayer channels exhibiting up to two orders of magnitude higher resistance-switching ratio at 300 K. This work points to an effective strategy to exploiting the charge-transfer effect at heteroepitaxial oxide interfaces for developing high-performance nanoelectronics.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201701385

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.