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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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Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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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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Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
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Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.4K
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.
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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
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An Improved Smart Meta-Superconductor MgB2.

Xiaopeng Zhao1, Qingyu Hai1, Miao Shi1

  • 1Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China.

Nanomaterials (Basel, Switzerland)
|August 12, 2022
PubMed
Summary
This summary is machine-generated.

Researchers enhanced smart meta-superconductors MgB2 by introducing a p-n junction nanostructured electroluminescent inhomogeneous phase. This improved the critical transition temperature, current density, and Meissner effect, offering a new path for superconductor performance enhancement.

Keywords:
electroluminescentelectron-surface plasmon polaritons couplinginjecting energyp-n junction nanostructured inhomogeneous phasesmart meta-superconductorsmart superconductivity

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Superconductivity Research

Background:

  • Improving critical parameters like transition temperature (Tc), current density (Jc), and Meissner effect (H) in conventional superconductors remains a significant challenge.
  • Previous attempts to enhance superconductor properties have shown limited success or required complex external conditions.

Purpose of the Study:

  • To investigate the effect of a p-n junction nanostructured electroluminescent inhomogeneous phase on the properties of Magnesium Diboride (MgB2) superconductors.
  • To explore a novel method for energy injection into superconductors to improve their performance characteristics.

Main Methods:

  • Fabrication of MgB2 with an integrated p-n junction nanostructured electroluminescent inhomogeneous phase.
  • Utilizing red wavelength light for energy injection into the meta-superconductor system.
  • Characterization of critical transition temperature (Tc), current density (Jc), and Meissner effect (H) before and after modification.

Main Results:

  • A significant improvement in the critical transition temperature (Tc) of MgB2 by 0.8 K.
  • An increase in current density (Jc) by 37% compared to pure MgB2.
  • A notable enhancement in the diamagnetism of the Meissner effect (H).
  • The p-n junction phase demonstrated superior luminescence intensity, stability, and simpler external field requirements compared to previous yttrium oxide phases.

Conclusions:

  • The introduction of a p-n junction nanostructured electroluminescent inhomogeneous phase effectively enhances the performance of MgB2 meta-superconductors.
  • The observed improvements suggest a potential coupling mechanism between superconducting electrons and surface plasmon polaritons.
  • This approach offers a promising new strategy for advancing superconductor technology.