Related Experiment Video
Updated: Jun 8, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.1K
Macroscopic Monochalcogenide van der Waals Ferroics: Growth, Domain Structures, and Curie Temperature
Eli Sutter1, Pramod Ghimire1,2, Peter Sutter2
1Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States.
Journal of the American Chemical Society
|November 8, 2024
Summary
Researchers synthesized large, few-layer van der Waals ferroelectric crystals of tin sulfide and selenide (SnS, SnSe). These materials overcome limitations of conventional ferroelectrics, enabling new applications in electronics and energy conversion.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Conventional ferroelectrics face limitations in miniaturization and integration.
- Two-dimensional van der Waals materials offer potential solutions.
- Previous synthesis methods yielded only small ferroic crystals (micrometer-sized).
Purpose of the Study:
- To realize large-area, few-layer ferroelectric crystals of tin(II) sulfide (SnS) and tin(II) selenide (SnSe).
- To investigate ferroic domain patterns in these materials, free from edge and finite-size effects.
- To enable the study of van der Waals ferroelectrics using established techniques.
Main Methods:
- Synthesis of in-plane ferroelectric few-layer crystals of SnS and SnSe.
- Electron microscopy and nanobeam electron diffraction for domain analysis.
- Polarized optical microscopy for material characterization.
Main Results:
- Achieved large crystals (up to 1 order of magnitude larger than previous reports).
- Identified two distinct domain types: twin domains with charged walls and novel rotational domains with neutral walls.
- Determined the Curie temperature of few-layer SnSe van der Waals ferroelectrics.
Conclusions:
- Large-area van der Waals ferroelectric crystals of SnS and SnSe have been successfully synthesized.
- These materials exhibit unique domain structures and properties suitable for advanced applications.
- The availability of large crystals facilitates fundamental research and device implementation in information processing and energy conversion.
More Related Videos
Related Concept Videos
01:31Ferromagnetism
2.4K
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...
2.4K
02:58Crystal Field Theory - Octahedral Complexes
26.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K
01:17Theory of Metallic Conduction
1.3K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.3K
01:28Types Of Superconductors
941
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
941
02:54Molecular and Ionic Solids
16.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.9K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.6K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.6K