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Related Concept Videos

Chirality02:25

Chirality

32.0K
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...
32.0K
Types Of Superconductors01:28

Types Of Superconductors

1.8K
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...
1.8K
Superconductor01:24

Superconductor

2.0K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
2.0K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

16.3K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
16.3K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

7.3K
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...
7.3K
Chirality in Nature02:30

Chirality in Nature

17.9K
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.
17.9K

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Updated: Mar 22, 2026

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

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Chiral superconductors.

Catherine Kallin1, John Berlinsky

  • 1McMaster University, Hamilton, ON, Canada.

Reports on Progress in Physics. Physical Society (Great Britain)
|April 19, 2016
PubMed
Summary
This summary is machine-generated.

Chiral superconductivity, a topological state, features spontaneous angular momentum. This review covers theory and experiments for Sr2RuO4 and UPt3, highlighting key signatures like Majorana modes.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials
  • Superconductivity

Background:

  • Chiral superconductivity is a topologically non-trivial quantum state characterized by spontaneous angular momentum.
  • This phenomenon involves the elimination of nodes in the superconducting gap, leading to unique surface and defect modes.

Purpose of the Study:

  • To review the current theoretical understanding and experimental evidence of chiral superconductivity.
  • To focus on prominent examples like Sr2RuO4 (chiral triplet p-wave) and UPt3 (chiral triplet f-wave).

Main Methods:

  • Discussion of theoretical frameworks for chiral superconductivity.
  • Analysis of experimental results from techniques including muon spin rotation (μSR), nuclear magnetic resonance (NMR), strain, polar Kerr effect, and Josephson tunneling.

Main Results:

  • Exploration of key signatures: spontaneous surface currents, chiral Majorana modes, Majorana states in vortex cores, and half-flux quantum vortices in triplet superconductors.
  • Detailed examination of experimental data supporting chiral superconductivity in Sr2RuO4 and UPt3.

Conclusions:

  • Chiral superconductivity presents a unique topological state with distinct experimental signatures.
  • Ongoing research continues to explore and confirm this phenomenon in various material systems.