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Related Concept Videos

Types Of Superconductors01:28

Types Of Superconductors

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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...
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Superconductor01:24

Superconductor

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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...
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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.
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Valence Bond Theory02:42

Valence Bond Theory

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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...
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Ferromagnetism01:31

Ferromagnetism

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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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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.
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Related Experiment Video

Updated: Jan 13, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Superconductivity in W3Re2C with Chiral Structure.

Lei Yang1,2, Jing Jiang1,2, Hui-Hui He1,2

  • 1School of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.

Journal of the American Chemical Society
|January 6, 2026
PubMed
Summary
This summary is machine-generated.

Superconductivity was discovered in cubic W3Re2C, a type-II BCS superconductor with a chiral structure and a transition temperature of 6.2 K. This material offers a platform for studying chiral structure effects on superconductivity and band topology.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Solid State Chemistry

Background:

  • Superconductivity is a quantum mechanical phenomenon observed in certain materials below a critical temperature.
  • Chiral structures in materials can lead to unique electronic and magnetic properties.
  • Understanding the interplay between crystal structure, electron interactions, and superconductivity is crucial for discovering new superconducting materials.

Purpose of the Study:

  • To discover and characterize superconductivity in novel materials with chiral structures.
  • To investigate the fundamental mechanisms driving superconductivity in W3Re2C.
  • To explore the relationship between crystal chirality, electronic band topology, and superconductivity.

Main Methods:

  • Synthesis and characterization of cubic W3Re2C.
  • Measurement of superconducting transition temperature (Tc).
  • Experimental analysis (e.g., specific heat, resistivity) to determine superconducting properties.
  • First-principles calculations (density functional theory) to investigate electronic structure and electron-phonon coupling.

Main Results:

  • Superconductivity discovered in cubic W3Re2C with a Tc of approximately 6.2 K.
  • W3Re2C identified as a bulk type-II BCS superconductor with an isotropic superconducting gap.
  • First-principles calculations reveal electron-phonon coupling mediated by W/Re 5d states and low-frequency phonons.
  • Breaking of inversion symmetry in W3Re2C leads to the emergence of Weyl points in its electronic structure.

Conclusions:

  • Cubic W3Re2C exhibits bulk type-II BCS superconductivity, influenced by its chiral structure.
  • The material's electronic structure features Weyl points due to broken inversion symmetry.
  • W3Re2C serves as a promising platform for exploring the impact of chirality on superconductivity and topological electronic properties.