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Related Concept Videos

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...
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

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Ferromagnetism

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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Spin–Spin Coupling: One-Bond Coupling

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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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PdTe: a strongly coupled superconductor.

A B Karki1, D A Browne, S Stadler

  • 1Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|January 19, 2012
PubMed
Summary
This summary is machine-generated.

Polycrystalline PdTe exhibits superconductivity below 4.5 K. Analysis indicates it is a strongly coupled superconductor due to significant electron-phonon interactions.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Superconductivity is a quantum mechanical phenomenon observed in certain materials.
  • Understanding the properties of novel superconducting materials is crucial for technological advancements.

Purpose of the Study:

  • To investigate the superconducting properties of polycrystalline PdTe.
  • To characterize its electrical transport, magnetic, and thermodynamic behavior.

Main Methods:

  • Measurements of electrical resistivity, magnetic susceptibility, and specific heat.
  • Determination of superconducting parameters like critical fields (H(c1), H(c2)) and Ginzburg-Landau parameters.
  • Comparison with theoretical band structure calculations.

Main Results:

  • PdTe exhibits superconductivity with a critical temperature (T(c)) below 4.5 K.
  • Estimated thermodynamic critical field H(c)(0), coherence length ξ(0), penetration depth λ(0), and Ginzburg-Landau parameter κ.
  • Enhanced density of states at the Fermi level due to strong electron-phonon coupling (λ(ep) = 1.4).

Conclusions:

  • PdTe is a strongly coupled superconductor, evidenced by large values of ΔC(p)/γ(n)T(c) and 2Δ(0)/k(B)T(c).
  • Electron-phonon coupling plays a significant role in its superconducting behavior.