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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
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Ionic Liquid Crystal Thin Film as Switching Layer in Nonvolatile Resistive Memory
Wenzhong Zhang1, Haruka Komatsu1, Shingo Maruyama1
1Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
ACS Applied Materials & Interfaces
|November 1, 2023
Summary
Ionic liquid crystals (ILCs) are introduced as a novel resistive switching layer for resistive random-access memory (ReRAM) devices. These ILC-based ReRAMs demonstrate low operating voltage and stable switching, paving the way for new electronic devices.
Area of Science:
- Materials Science
- Electronics Engineering
- Condensed Matter Physics
Background:
- Resistive random-access memory (ReRAM) is a promising nonvolatile memory technology.
- Developing novel materials for resistive switching layers is crucial for improving ReRAM performance.
- Ionic liquid crystals (ILCs) have unique properties that could be leveraged for electronic applications.
Purpose of the Study:
- To investigate the potential of ionic liquid crystals (ILCs) as a resistive switching layer in nonvolatile ReRAM devices.
- To demonstrate the operational feasibility and characteristics of ILC-based ReRAM.
- To elucidate the switching mechanism in ILC-based ReRAM.
Main Methods:
- Fabrication of high-quality vacuum-deposited ILC films ([C16mim][PF6]).
- Characterization of ILC films and their electrical properties.
- Electrical testing of ReRAM devices incorporating ILC layers, including I-V curve analysis.
- Analysis of switching behavior and operating voltage.
Main Results:
- Successful demonstration of the first ReRAM devices utilizing an ILC switching layer.
- Achieved low set voltage of approximately 1 V.
- Exhibited stable switching behavior for up to approximately 44 cycles.
- Identified the smectic A phase of the ILC as critical for device operation.
- Operation principle attributed to the formation and rupture of charge-composed filaments, governed by the trap charge limited current (TCLC) mechanism.
Conclusions:
- Ionic liquid crystals are a viable new material for resistive switching layers in ReRAM.
- ILC-based ReRAM offers low operating voltage and stable performance.
- The unique properties of ILCs, particularly in their liquid crystal phase, enable efficient resistive switching.
- This work opens new avenues for ILC-based electronic device research and development.
Keywords:
ionic liquid crystalnonvolatile memoryresistive switchingsmectic A phasethin filmtrap charge limited currentMore Related Videos
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