LaAlO3/SrTiO3 Heterointerface: 20 Years and Beyond

Shunfeng Chen, Yuanjie Ning, Chi Sin Tang, Liang Dai, Shengwei Zeng, Kun Han, Jun Zhou, Ming Yang, Yanqun Guo, Chuanbing Cai, Ariando Ariando, Andrew T.S. Wee, Xinmao Yin

Research output: Journal article publicationReview articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

This year marks the 20th anniversary of the discovery of LaAlO3/SrTiO3 (LAO/STO) oxide heterointerfaces. Since their discovery, transition metal oxide (TMO) interfaces have emerged as a fascinating and fast-growing area of research, offering a variety of unique and exotic physical properties which has provided a strong impetus for the rapid advances and actualization of oxide electronics. This review revisits the fundamental mechanisms accounting for the two-dimensional (2D) conducting interfaces, and how new models proposed to better account for the unique interfacial effects. Recent breakthroughs in the theoretical and experimental domains of oxide interfaces are also discussed including the detection and investigation of 2D quasiparticle. Moving beyond the well-known LAO/STO interface, this review delves into other systems where unconventional interfacial superconductivity, interfacial magnetism, and spin polarization are dealt with in greater detail. In terms of device applications, this review proceeds with a treatment on the recent developments in domains including field effect transistors and freestanding heterostructure membranes. By emphasizing the opportunities and challenges of integrating oxide interfaces with existing technologies, the review will end off with an outlook projecting the progress and the trajectory of this research domain in the years to come.

Original languageEnglish
Article number2300730
JournalAdvanced Electronic Materials
Volume10
Issue number3
DOIs
Publication statusPublished - Mar 2024

Keywords

  • 2D electron gas
  • interfacial superconductivity
  • oxide electronic device
  • perovskite oxide interface
  • quasiparticle dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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