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Ionic-Electronic Coupling Enables Stable and Precise Memristive Switching through Reversible Crystalline-Solid

Huihan Li1, Haozhe Jin2, Ze Hua3

  • 1Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, People's Republic of China.

Nano Letters
|December 31, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a stable lithium-ion-regulated memristor using VS2 nanoflakes. It achieves precise, reversible conductance tuning by suppressing structural degradation through a novel crystalline-solid solution process.

Keywords:
in situ characterizationlithium-ion intercalationmultilevel conductance modulationsolid solution transition

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid-State Physics

Background:

  • Coupled ionic-electronic effects are key for advanced memristive devices.
  • Layered transition metal chalcogenides facilitate ion migration but face stability issues due to ion intercalation/deintercalation.
  • Structural degradation limits the stability of ion-intercalated memristive devices.

Purpose of the Study:

  • To develop a stable memristive device using lithium-ion regulation.
  • To investigate the mechanism of reversible and linear conductance tuning in such devices.
  • To demonstrate the potential of crystalline-solid solution processes for stable ionic devices.

Main Methods:

  • Fabrication of a memristor using hexagonal-phase VS2 nanoflakes.
  • In situ transmission electron microscopy (TEM) and Raman spectroscopy.
  • Electrical characterization of device performance under voltage pulses.

Main Results:

  • Achieved reversible and highly linear conductance tuning.
  • Demonstrated 32 stable conductance states with excellent retention and endurance.
  • Identified reversible crystalline-solid solution transition induced by lithium-ion intercalation/deintercalation as the mechanism, suppressing degradation.

Conclusions:

  • Lithium-ion regulation in VS2 nanoflakes enables stable memristive devices.
  • The crystalline-solid solution transition is crucial for suppressing structural degradation.
  • This work highlights the potential of ion dynamics and lattice evolution for high-precision ionic devices.