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Related Concept Videos

Superconductor01:24

Superconductor

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...
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

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,...
Types Of Superconductors01:28

Types Of Superconductors

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...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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...
Energy Bands in Solids01:01

Energy Bands in Solids

Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states that no two...
Band Theory02:35

Band Theory

When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...

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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Superconductivity in the Einstein solid VAl(10.1).

T Klimczuk1, M Szlawska, D Kaczorowski

  • 1European Commission, Joint Research Center, Institute for Transuranium Elements, Postfach 2340, D-76125 Karlsruhe, Germany. tomasz.klimczuk@ec.europa.eu

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 16, 2012
PubMed
Summary
This summary is machine-generated.

The Einstein solid VAl(10.1) exhibits superconductivity below 1.53 K. This weak-coupling, type-II superconductor features an isotropic energy gap, confirmed by magnetic susceptibility, resistivity, and heat capacity measurements.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity

Background:

  • Superconductivity in intermetallic compounds is crucial for technological applications.
  • Understanding the fundamental properties of novel superconductors is an ongoing scientific pursuit.

Purpose of the Study:

  • To characterize the superconducting state of the Einstein solid VAl(10.1).
  • To determine key superconducting parameters such as critical temperature and energy gap.

Main Methods:

  • Magnetic susceptibility measurements.
  • Electrical resistivity measurements.
  • Heat capacity measurements.

Main Results:

  • VAl(10.1) was identified as a weak-coupling, type-II superconductor.
  • The critical temperature (Tc) was determined to be 1.53 K.
  • An isotropic energy gap (Δ(0)) of 0.23 meV and an upper critical field (Hc2(0)) of 800 Oe were observed.

Conclusions:

  • The findings confirm VAl(10.1) as a novel superconductor with specific characteristics.
  • The data supports an isotropic superconducting energy gap model for VAl(10.1).