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Related Concept Videos

Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Types of Semiconductors01:20

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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Fermi Level Dynamics01:12

Fermi Level Dynamics

The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
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Metal-Semiconductor Junctions01:24

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Schottky Barriers
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

Hexagonal ABC semiconductors as ferroelectrics.

Joseph W Bennett1, Kevin F Garrity, Karin M Rabe

  • 1Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.

Physical Review Letters
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Researchers discovered a new class of ferroelectric materials using computational methods. These materials, based on the P6(3)mc LiGaGe structure, show promise for advanced electronic applications.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Computational Chemistry

Background:

  • Ferroelectric materials are crucial for electronic devices.
  • Discovering new ferroelectric materials with enhanced properties is an ongoing challenge.

Purpose of the Study:

  • To identify a novel class of ferroelectric materials.
  • To explore the P6(3)mc LiGaGe structure type for ferroelectricity.
  • To guide experimental synthesis and application of these materials.

Main Methods:

  • Utilized a first-principles rational-design approach.
  • Calculated structural parameters, polarization, and ferroelectric well depths.
  • Investigated both reported and hypothetical material representatives.

Main Results:

  • Identified a previously unrecognized class of ferroelectric materials.
  • Characterized the properties of these materials within the P6(3)mc LiGaGe structure.
  • Provided data on polarization and ferroelectric well depths.

Conclusions:

  • The P6(3)mc LiGaGe structure type hosts a new class of ferroelectric materials.
  • The findings offer a roadmap for experimental realization.
  • These materials hold potential for high-performance applications.