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Type I superconductivity in Dirac materials.

B Ya Shapiro1, I Shapiro1, Dingping Li2,3

  • 1Department of Physics, Institute of Superconductivity, Bar-Ilan University, Ramat-Gan 52900, Israel.

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Summary
This summary is machine-generated.

PdTe2 exhibits rare first-kind superconductivity in Dirac semimetals. This hybrid material, with Dirac-parabolic bands, bridges extremes and offers insights into unconventional superconductivity.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Superconductivity in 3D Weyl and Dirac semimetals is typically of the second kind.
  • PdTe2 presents a rare instance of first-kind superconductivity, unusual for Dirac semimetals.
  • This behavior contrasts with conventional metallic superconductors exhibiting parabolic dispersion.

Purpose of the Study:

  • To investigate the 'hybrid' Dirac-parabolic nature of PdTe2.
  • To develop a microscopic theory for superconductivity in such materials.
  • To analyze magnetic properties and coherence lengths in PdTe2.

Main Methods:

  • Derivation of a microscopic pairing theory for arbitrary tilt parameters.
  • Calculation of anisotropic coherence lengths and penetration depths.
  • Application of Ginzburg-Landau theory to study magnetic properties.

Main Results:

  • PdTe2 exhibits a unique 'hybrid' band structure with both Dirac and parabolic dispersions.
  • The derived theory successfully explains experimental observations for PdTe2.
  • Anisotropic magnetic properties were determined based on the derived Ginzburg-Landau theory.

Conclusions:

  • PdTe2 represents an important intermediate case between Dirac and conventional superconductors.
  • The developed theoretical framework is applicable to understanding superconductivity in hybrid materials.
  • Further research into the magnetic response of layered superconductors is warranted.