Optoelectronic Ferroelectric Domain-Wall Memories Made from a Single Van Der Waals Ferroelectric

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Fei Xue
  • Xin He
  • Wenhao Liu
  • Dharmaraj Periyanagounder
  • Chenhui Zhang
  • Mingguang Chen
  • Chun-Ho Lin
  • Linqu Luo
  • Emre Yengel
  • Vincent Tung
  • Thomas D. Anthopoulos
  • Lain-Jong Li
  • Xixiang Zhang

Detail(s)

Original languageEnglish
Article number2004206
Journal / PublicationAdvanced Functional Materials
Volume30
Issue number52
Online published20 Sep 2020
Publication statusPublished - 22 Dec 2020

Abstract

Due to the potential applications in optoelectronic memories, optical control of ferroelectric domain walls has emerged as an intriguing and important topic in modern solid-state physics. However, its device implementation in a single ferroelectric, such as conventional BaTiO3 or PZT ceramics, still presents huge challenges in terms of the poor material conductivity and the energy mismatch between incident photons and ferroelectric switching. Here, using the generation of photocurrent in conductive α-In2Se3 (a van der Waals ferroelectric) with a two-terminal planar architecture, the first demonstration of optical-engineered ferroelectric domain wall in a non-volatile manner for optoelectronic memory application is reported. The α-In2Se3 device exhibits a large optical-writing and electrical-erasing (on/off) ratio of >104, as well as multilevel current switching upon optical excitation. The narrow direct bandgap of the multilayer α-In2Se3 ferroelectric endows the device with broadband optical-writing wavelengths greater than 900 nm. In addition, photonic synapses with approximate linear weight updates for neuromorphic computing are also achieved in the ferroelectric devices. This work represents a breakthrough toward technological applications of ferroelectric nanodomain engineering by light.

Research Area(s)

  • domain walls, optoelectronic memories, photonic synapses, van der Waal ferroelectrics

Citation Format(s)

Optoelectronic Ferroelectric Domain-Wall Memories Made from a Single Van Der Waals Ferroelectric. / Xue, Fei; He, Xin; Liu, Wenhao; Periyanagounder, Dharmaraj; Zhang, Chenhui; Chen, Mingguang; Lin, Chun-Ho; Luo, Linqu; Yengel, Emre; Tung, Vincent; Anthopoulos, Thomas D.; Li, Lain-Jong; He, Jr-Hau; Zhang, Xixiang.

In: Advanced Functional Materials, Vol. 30, No. 52, 2004206, 22.12.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review