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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.9K
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...
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Chirality02:25

Chirality

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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

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Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
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Chirality in Nature02:30

Chirality in Nature

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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
16.3K
Valence Bond Theory02:42

Valence Bond Theory

10.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.8K
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

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Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
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Related Experiment Video

Updated: Dec 20, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Controllable skyrmion chirality in ferroelectrics.

Yu Tikhonov1,2, S Kondovych2,3, J Mangeri4,5

  • 1Faculty of Physics, Southern Federal University, 5 Zorge str., 344090, Rostov-on-Don, Russia.

Scientific Reports
|May 28, 2020
PubMed
Summary
This summary is machine-generated.

Chirality in materials is typically fixed, but this study shows ferroelectric nanodots can host switchable skyrmions. This controlled chirality offers new possibilities for advanced information technologies.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Nanotechnology

Background:

  • Chirality, or handedness, is a fundamental property of matter with applications in optics, spintronics, and pharmaceuticals.
  • Typically, a material's chirality is an inherent and unchangeable characteristic.

Purpose of the Study:

  • To demonstrate that ferroelectric nanodots can host skyrmions with controllable chirality.
  • To develop methods for manipulating and switching the chirality of these skyrmions.

Main Methods:

  • Utilizing ferroelectric nanodots as a platform for hosting magnetic quasiparticles.
  • Developing protocols for controlling and switching skyrmion chirality within these nanodots.

Main Results:

  • Ferroelectric nanodots successfully support skyrmions.
  • The chirality of these skyrmions can be effectively controlled and switched.
  • Protocols for efficient manipulation of different skyrmion types were devised.

Conclusions:

  • Demonstrated a novel method for achieving controlled and switchable chirality in materials.
  • Findings pave the way for ferroelectric-based information technologies leveraging tunable chirality.