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Spin-charge interconversion of two-dimensional electron gases at oxide interfaces.

Dongyao Zheng1,2, Hui Zhang1,2, Fengxia Hu3,4

  • 1School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, People's Republic of China.

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|November 17, 2023
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Summary

Oxide two-dimensional electron gases (2DEGs) offer tunable spin-orbit coupling for efficient spin-charge conversion. This review details recent advances in utilizing 2DEGs at oxide interfaces for this crucial spintronic application.

Keywords:
Rashba spin–orbit couplingoxide interfacesspin-charge interconversiontwo-dimensional electron gases

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Oxide two-dimensional electron gases (2DEGs) exhibit strong, tunable Rashba spin-orbit coupling.
  • These systems are formed at the interface of oxide heterojunctions.
  • 2DEGs are promising platforms for interconverting spin and charge currents.

Purpose of the Study:

  • To review recent advancements in spin-charge interconversion using 2DEGs at oxide interfaces.
  • To analyze the properties and efficiency of spin-to-charge conversion.
  • To summarize methods for charge-to-spin current conversion.

Main Methods:

  • Review of experimental and theoretical studies on spin-charge interconversion in oxide 2DEGs.
  • Analysis of different spin current injection techniques.
  • Summarization of experimental methods for charge-to-spin conversion.

Main Results:

  • Detailed analysis of spin-to-charge conversion efficiencies via various injection methods.
  • Comprehensive summary of charge-to-spin conversion under diverse experimental conditions.
  • Identification of key properties influencing interconversion efficiency.

Conclusions:

  • Oxide 2DEGs provide a versatile platform for efficient spin-charge interconversion.
  • Recent research offers methods for understanding and regulating this conversion.
  • These findings pave the way for advanced spintronic devices.