Anomalous properties in normal and superconducting states of Sc2Ir4-xSix due to flat band effect driven by spin-orbit coupling Article Swipe
Zhengyan Zhu
,
Yuxiang Wu
,
Shengtai Fan
,
Xuecong Li
,
Yiwen Li
,
Yongze Ye
,
Xiyu Zhu
,
Haijun Zhang
,
Hai‐Hu Wen
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1038/s43246-024-00521-4
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1038/s43246-024-00521-4
Correlation effect may be induced by the flat band(s) near the Fermi energy, as demonstrated in twisted graphene, Kagome materials, and heavy Fermion materials. Unconventional superconductivity may arise from this correlation effect and show deviation from the phonon-mediated pairing as well as the Landau Fermi liquid in the normal state. Here, we report the anomalous properties in normal and superconducting states in the Laves phase superconductor Sc 2 Ir 4- x Si x with a kagome lattice and silicon doping. By doping silicon to the iridium sites, a phase diagram with nonmonotonic and two-dome-like doping dependence of the superconducting transition temperature T c was observed. The samples in the region of the second dome, including Sc 2 Ir 3.5 Si 0.5 with the optimal T c , exhibit non-Fermi liquid behavior at low temperatures after superconductivity is suppressed, as evidenced by the divergence of the specific heat coefficient and the semiconducting-like resistivity, together with a strong superconducting fluctuation in the optimally doped samples. Combined with first-principles calculations, we attribute the anomalous properties in normal and superconducting states to the correlation effect, which is intimately induced by the flat band effect when considering the strong spin-orbit coupling.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1038/s43246-024-00521-4
- https://www.nature.com/articles/s43246-024-00521-4.pdf
- OA Status
- gold
- Cited By
- 2
- References
- 68
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4399010999
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- OpenAlex ID
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https://openalex.org/W4399010999Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1038/s43246-024-00521-4Digital Object Identifier
- Title
-
Anomalous properties in normal and superconducting states of Sc2Ir4-xSix due to flat band effect driven by spin-orbit couplingWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2024Year of publication
- Publication date
-
2024-05-25Full publication date if available
- Authors
-
Zhengyan Zhu, Yuxiang Wu, Shengtai Fan, Xuecong Li, Yiwen Li, Yongze Ye, Xiyu Zhu, Haijun Zhang, Hai‐Hu WenList of authors in order
- Landing page
-
https://doi.org/10.1038/s43246-024-00521-4Publisher landing page
- PDF URL
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https://www.nature.com/articles/s43246-024-00521-4.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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goldOpen access status per OpenAlex
- OA URL
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https://www.nature.com/articles/s43246-024-00521-4.pdfDirect OA link when available
- Concepts
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Superconductivity, Condensed matter physics, Spin–orbit interaction, Coupling (piping), Physics, Spin (aerodynamics), Orbit (dynamics), Materials science, Thermodynamics, Metallurgy, Aerospace engineering, EngineeringTop concepts (fields/topics) attached by OpenAlex
- Cited by
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2Total citation count in OpenAlex
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2025: 2Per-year citation counts (last 5 years)
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68Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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