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Superconductivity on a Bi Square Net in LiBi.

Karolina Górnicka1,2, Sylwia Gutowska3, Michał J Winiarski1,2

  • 1Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland.

Chemistry of Materials : a Publication of the American Chemical Society
|October 30, 2020
PubMed
Summary
This summary is machine-generated.

Lithium Bismuthate (LiBi) exhibits superconductivity due to its unique crystal structure. Theoretical and experimental data reveal its properties as a moderately coupled type-I superconductor.

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Area of Science:

  • Solid State Physics
  • Materials Science
  • Superconductivity

Background:

  • Lithium Bismuthate (LiBi) is a compound containing the lightest and heaviest nonradioactive metals.
  • Understanding the interplay between crystal structure and superconductivity is crucial for novel material discovery.

Purpose of the Study:

  • To perform crystallographic analysis, superconducting characterization, and theoretical modeling of LiBi.
  • To elucidate the factors contributing to the superconducting properties of LiBi.

Main Methods:

  • X-ray crystallography for structural determination.
  • Magnetic susceptibility and heat capacity measurements for superconducting characterization.
  • Theoretical modeling to understand electronic structure and bonding.

Main Results:

  • LiBi crystallizes in a tetragonal (CuAu-type) structure with Bi square nets and Li planes.
  • LiBi is a moderately coupled type-I superconductor with a critical temperature (Tc) of 2.48 K.
  • Theoretical studies indicate the bismuth square net is key to superconductivity, with Li-Bi plane coupling contributing significantly.

Conclusions:

  • The crystal structure and electronic interactions in LiBi are responsible for its observed superconductivity.
  • LiBi serves as an interesting system for studying superconductivity in compounds with light and heavy nonradioactive elements.