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Th2Mo2Ir2Si4C: An Intergrown Superconductor by Structure Design.

Hua-Xun Li1, Yi-Qiang Lin1, Wu-Zhang Yang2

  • 1School of Physics, Zhejiang University, Hangzhou 310058, China.

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|March 20, 2025
PubMed
Summary
This summary is machine-generated.

Researchers designed and synthesized a novel quinary intermetallic compound, Th2Mo2Ir2Si4C, featuring distinct superconducting layers. This new material exhibits enhanced superconductivity with a transition temperature of 3.4 K.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid State Chemistry

Background:

  • Discovering new superconductors in complex multicomponent systems is challenging.
  • Superconductors with distinct, separate superconducting layers are exceptionally rare in complex materials.

Purpose of the Study:

  • To design and synthesize a novel quinary intermetallic compound with distinct superconducting layers.
  • To investigate the structural and superconducting properties of the newly synthesized material.

Main Methods:

  • Utilized a block-layer model and formation energy calculations for material design.
  • Synthesized the quinary intermetallic compound Th2Mo2Ir2Si4C.
  • Characterized the material's structure and superconducting properties using electrical resistivity, magnetic susceptibility, and specific heat measurements.

Main Results:

  • Successfully synthesized Th2Mo2Ir2Si4C, which crystallizes in an intergrowth structure with alternating ThMo2Si2C and ThIr2Si2 block layers.
  • Observed enhanced superconductivity with a transition temperature (Tc) of 3.4 K and a zero-temperature upper critical field (Hc2(0)) of 9.5 kOe.
  • Identified Si-Ir bonding as the dominant interblock-layer interaction, leading to stronger coupling between layers.

Conclusions:

  • The block-layer design strategy is effective for creating complex superconductors with distinct superconducting layers.
  • The developed strategy can be applied to design other intergrowth systems incorporating various functional motifs.
  • Th2Mo2Ir2Si4C represents a rare example of a complex superconductor with distinct superconducting layers, offering a new platform for superconductivity research.