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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...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Types of Semiconductors01:20

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
Fermi Level Dynamics01:12

Fermi Level Dynamics

The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Fermi Level01:18

Fermi Level

The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Superconducting group-IV semiconductors.

Xavier Blase1, Etienne Bustarret, Claude Chapelier

  • 1Institut Néel, CNRS and Université Joseph Fourier, BP 166, 38042 Grenoble Cedex 9, France. xavier.blase@grenoble.cnrs.fr

Nature Materials
|April 24, 2009
PubMed
Summary

Research on doping-induced superconductivity in group IV covalent semiconductors reveals ongoing questions about coupling mechanisms and critical temperatures. Future innovations may combine diamond or silicon properties with semiconductor technologies for new superconducting devices.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid-State Chemistry

Background:

  • Significant research exists on doping-induced superconductivity in group IV covalent semiconductors.
  • Key questions persist regarding the coupling mechanisms (electronic correlation, phonons, or both) and their influence on superconductivity.
  • The relationship between doping concentration and critical temperature (T(c)) remains a critical area of investigation for achieving higher transition temperatures.

Purpose of the Study:

  • To review recent advancements and predictions in doping-induced superconductivity in group IV covalent semiconductors.
  • To highlight the specific cases of boron-doped diamond and silicon.
  • To explore the potential for developing novel superconducting devices leveraging semiconductor technologies.

Main Methods:

  • Review of experimental and theoretical studies on doping-induced superconductivity.
  • Focus on analysis of boron-doped diamond and silicon systems.
  • Discussion of the impact of doping concentration, disorder, and dopant homogeneity.

Main Results:

  • Identification of persistent open questions and puzzling results in the field.
  • Emphasis on the ongoing debate surrounding coupling mechanisms and their relation to T(c).
  • Presentation of recent achievements and future predictions for superconducting group IV semiconductors.

Conclusions:

  • The field of doping-induced superconductivity in group IV covalent semiconductors requires further clarification on fundamental mechanisms.
  • Understanding the interplay between doping, disorder, and superconductivity is crucial for future progress.
  • The integration of diamond or silicon properties with mature semiconductor technologies promises innovative superconducting devices.