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Related Concept Videos

Non-ohmic Devices00:51

Non-ohmic Devices

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
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Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
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High-Power LiNbO3 Domain-Wall Nanodevices.

Jie Sun1, Yiming Li1, Boyang Zhang1

  • 1State Key Laboratory of ASIC & System, School of Microelectronics, Fudan University, Shanghai200433, China.

ACS Applied Materials & Interfaces
|February 1, 2023
PubMed
Summary
This summary is machine-generated.

Researchers discovered highly conductive domain walls (DWs) in lithium niobate, enabling advanced nanoelectronic devices. These domain walls exhibit diode-like behavior, paving the way for high-performance power electronics and memory applications.

Keywords:
LiNbO3 single crystalcurrent densitydiodedomain wallinclination anglenanodevices

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Wide band gap semiconductors are crucial for advanced power electronics.
  • Ferroelectric domain walls (DWs) offer potential for adaptive nanoelectronics.
  • High current density in DWs is essential for device performance.

Purpose of the Study:

  • To investigate the conduction properties of ferroelectric domain walls.
  • To optimize DWs for high current density and diode-like behavior.
  • To explore applications in advanced electronic devices.

Main Methods:

  • Fabrication of ferroelectric single-crystal films on Si substrates.
  • Creation and manipulation of domain walls using voltage pulses.
  • Measurement of domain wall conduction properties, including current density and on/off ratio.

Main Results:

  • Observed significantly higher conduction in head-to-head DWs compared to tail-to-tail DWs in LiNbO3.
  • Achieved diode-like wall conduction with current density > 1 mA/μm and on/off ratio > 10^6.
  • Demonstrated fast switching (<10 ns) and high endurance (>10^5 cycles).

Conclusions:

  • Optimized ferroelectric domain walls exhibit superior conduction properties for power electronics.
  • These DWs enable high-density nonvolatile memory, sensors, and rectifiers.
  • Potential for novel nanocircuits where traditional p-n junctions fail.