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Low-Voltage Domain-Wall LiNbO3 Memristors.

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This study introduces an energy-efficient method for resistive switching devices by tuning ferroelectric domain wall (DW) conductivity, avoiding high-energy polarization reversal. This enables continuous resistance tuning for advanced memory and computing applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Ferroelectric domain walls (DWs) offer potential for novel resistive switching devices.
  • Conventional methods rely on controlling DW density, which is energy-intensive due to high leakage currents.
  • A need exists for energy-efficient resistance control in ferroelectric devices.

Purpose of the Study:

  • To demonstrate a new approach for resistive switching by tuning the intrinsic conductivity of DWs.
  • To investigate the energy-efficient control of resistance in LiNbO3 capacitors with graphene.
  • To explore applications in multilevel memories and neuromorphic computing.

Main Methods:

  • Utilized LiNbO3 capacitors integrated with graphene electrodes.
  • Applied subcoercive voltage to tune the conductivity of existing DWs.
  • Investigated the reversible transition between conducting and insulating states of DWs.

Main Results:

  • Demonstrated continuous resistance tuning in a polydomain state device.
  • Achieved resistance modulation without altering the domain structure.
  • Showcased an energy-efficient mechanism for resistance control.

Conclusions:

  • Tuning DW conductivity offers an energy-efficient alternative to domain rearrangement for resistive switching.
  • The developed approach is suitable for creating advanced memristive devices.
  • Promising for applications in multilevel data storage and neuromorphic computing architectures.