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Superconductivity in highly disordered dense carbon disulfide.

Ranga P Dias1, Choong-Shik Yoo, Viktor V Struzhkin

  • 1Departments of Physics and Chemistry, Institute for Shock Physics, Washington State University, Pullman, WA 99164, USA.

Proceedings of the National Academy of Sciences of the United States of America
|July 3, 2013
PubMed
Summary

Researchers discovered superconductivity in carbon disulfide under high pressure. This novel finding in molecular systems, observed in the CS4 phase, occurs at 6.2 K and may stem from structural changes.

Keywords:
extended solidsmagnetic orderingmetallizationnon-Fermi liquidsnonconventional superconductors

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Chemistry

Background:

  • High pressure is crucial for discovering new superconductors.
  • Superconductivity in molecular systems is limited due to electronic configurations.
  • Previous molecular superconductors had low transition temperatures.

Purpose of the Study:

  • To investigate superconductivity in molecular systems under high pressure.
  • To explore novel superconducting materials beyond metallic and metal oxides.
  • To understand the mechanisms behind high-pressure superconductivity in molecular compounds.

Main Methods:

  • Subjecting diamagnetic carbon disulfide to high pressures (50–172 GPa).
  • Observing low-temperature superconductivity using electrical measurements.
  • Analyzing structural changes with X-ray scattering.

Main Results:

  • A superconducting phase was observed in carbon disulfide at approximately 6.2 K.
  • Superconductivity occurred in a highly disordered extended state (CS4 phase).
  • X-ray scattering data indicated a local structural transformation.

Conclusions:

  • High pressure can induce superconductivity in molecular systems like carbon disulfide.
  • The observed superconductivity is linked to a structural transition from tetrahedral to octahedral configurations.
  • This finding expands the scope of molecular superconductors and their potential applications.