Superconductivity in Co-Layered LaCoSi.
Zhengwen He1, Rongjin Huang2, Kaiyao Zhou3
1Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China.
Inorganic Chemistry
|April 22, 2021
Summary
Researchers discovered superconductivity in the LaCoSi compound at 4 K, marking the first "111" cobalt-based superconductor. This finding offers a new direction for exploring novel cobalt-based superconducting materials.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Cobalt-based superconductors are rare compared to iron- or nickel-based counterparts.
- Discovering new superconducting materials is crucial for technological advancements.
Purpose of the Study:
- To identify and characterize new superconducting compounds.
- To investigate the potential of cobalt-based materials for superconductivity.
Main Methods:
- Neutron and synchrotron X-ray powder diffraction were used for structural analysis.
- First-principles calculations were employed to study the electronic band structure.
Main Results:
- Superconductivity was observed in the LaCoSi compound at a critical temperature of 4 K.
- LaCoSi was identified as the first "111" type cobalt-based superconductor.
- Structural and electronic properties of LaCoSi are similar to the iron-based superconductor LiFeAs.
Conclusions:
- LaCoSi represents a significant discovery in the field of cobalt-based superconductivity.
- The quasi-two-dimensional electronic structure and small structural distortion in LaCoSi may promote superconductivity.
- This research provides a pathway for the discovery of new cobalt-based superconducting materials.
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