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Updated: Jul 6, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Redox Gating for Colossal Carrier Modulation and Unique Phase Control.

Le Zhang1,2, Changjiang Liu1,3, Hui Cao1,2,4

  • 1Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA.

Advanced Materials (Deerfield Beach, Fla.)
|January 6, 2024
PubMed
Summary
This summary is machine-generated.

Redox gating enables efficient electronic phase control in oxide thin films by precisely modulating charge carriers. This sustainable, sub-volt technique avoids defects, offering a versatile platform for advanced electronic devices.

Keywords:
carrier modulationelectron injectionmetal‐insulator transitionphase controlredox gatingtransistor

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrochemistry

Background:

  • Conventional electrolyte gating faces limitations due to ionic defects and intercalation, hindering precise charge transport control.
  • Achieving significant carrier density modulation and stable electronic phase control in functional materials remains a key challenge.

Purpose of the Study:

  • To introduce and demonstrate redox gating as a novel, power-efficient method for engineering charge transport in functional oxide thin films.
  • To showcase the ability of redox gating to achieve colossal carrier density modulation and decouple electrical and structural phase transitions.

Main Methods:

  • Utilizing reversible redox functionalities combined with ionic electrolytes for charge carrier injection.
  • Applying sub-volt electrical bias to functional oxide thin films to induce electronic phase changes.

Main Results:

  • Achieved sheet carrier density modulation exceeding 10^16 cm^-2 with high endurance over thousands of cycles.
  • Demonstrated decoupling of electrical and structural phase transitions, enabling isostructural metal-insulator transitions.
  • Confirmed the technique's effectiveness across various materials, including heterostructures and quantum materials, irrespective of crystallinity or carrier type.

Conclusions:

  • Redox gating offers a defect-free, power-efficient approach for precise charge transport engineering and electronic phase control.
  • The method's versatility and broad applicability make it a promising technique for next-generation electronic devices utilizing sustainable materials.