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Related Experiment Videos

Superconductivity in diamond.

E A Ekimov1, V A Sidorov, E D Bauer

  • 1Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, 142190 Troitsk, Moscow region, Russia.

Nature
|April 2, 2004
PubMed
Summary
This summary is machine-generated.

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Superconductivity was discovered in boron-doped diamond, a material known for hardness and heat conductivity. This finding opens possibilities for superconductivity in other diamond-structured materials.

Area of Science:

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

Background:

  • Diamond is an electrical insulator with exceptional hardness, high thermal conductivity, and high electric field resistance.
  • Introducing charge carriers via doping, such as with boron, can alter diamond's electronic properties.
  • Boron doping creates hole-doped diamond due to boron's electron deficiency and small atomic radius.

Purpose of the Study:

  • To investigate the electronic properties of boron-doped diamond synthesized under extreme conditions.
  • To determine if superconductivity can be induced in boron-doped diamond.
  • To characterize the superconducting properties of this novel material.

Main Methods:

  • Synthesis of boron-doped diamond at high pressure (approx. 100,000 atm) and high temperature (2,500–2,800 K).

Related Experiment Videos

  • Electrical resistivity measurements.
  • Magnetic susceptibility measurements.
  • Specific heat measurements.
  • Field-dependent resistance measurements.

    • Main Results:

    • Boron-doped diamond exhibits bulk, type-II superconductivity below a critical temperature (T(c)) of approximately 4 K.
    • Superconductivity persists in a magnetic field up to an upper critical field (Hc2(0)) of at least 3.5 T.
    • The superconducting transition is confirmed by multiple measurement techniques.

    Conclusions:

    • Superconductivity has been discovered in boron-doped diamond.
    • This discovery suggests that other diamond-structured materials like silicon and germanium may also exhibit superconductivity.
    • Boron-doped diamond is a new bulk superconductor with potential applications.