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Superconductivity and non-trivial band topology in high-entropy carbonitride Ti0.2Nb0.2Ta0.2Mo0.2W0.2C1-xNx
Open accessAbstract
High-entropy materials (HEMs) are widely recognized for their remarkable resistance to degradation and exceptional mechanical characteristics, rendering them valuable for use in challenging environments. Simultaneously, the investigation of novel attributes of HEMs has long been a crucial focus of scientific exploration. Based on this theoretical framework, we devised and produced a sequence of original bulk Ti 0.2 Nb 0.2 Ta 0.2 Mo 0.2 W 0.2 C 1-xNx (0 ≤ x ≤ 0.45) superconductors. Furthermore, it has been observed that Ti 0.2 Nb 0.2 Ta 0.2 Mo 0.2 W 0.2 C 1-xNx HECN ceramics possess type-Ⅱ Dirac points in the electronic band structure, implying that these unique bulk HECN ceramics have potential as candidates to bridge superconductivity with topology. These discoveries enhance our comprehension of the physical properties and potential applications of HECN ceramics, thereby establishing them as a promising platform for exploring unconventional physics, such as band topology and superconductivity.
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“The discovered high-entropy carbide superconductors are type II superconductors, with μ 0Hc2(0) values between 0.5 and 5 T.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
Experimental — accuracy not yet measuredThe source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
In the citing paper
“The speci fi c heat jump value is close to the theoretical BCS value of 1.43.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
Experimental — accuracy not yet measuredThe source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
In the citing paper
“Experimental evidence has indicated that the VEC of HEA and HEC superconductors is critical in determining their superconducting T c and material stability.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
Experimental — accuracy not yet measuredThe source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
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“Currently, topological properties are reported in many high-entropy carbide superconductors 44 -46 .”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
Experimental — accuracy not yet measuredThe cited source says what the claim attributes to it.
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“The highest Tc of these high-entropy carbide superconductors is approximately 6 K, which is observed in the Ti0.2Nb0.2Ta0.2Mo0.2W0.2C0.7N0.3 sample.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
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In the citing paper
“Superconductivity was also observed in the Ti0.2Zr0.2Nb0.2Ta0.2Mo0.2C x and Ti0.2Nb0.2Ta0.2Mo0.2W0.2C1x N x systems 45,46 .”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
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In the citing paper
“In NaCltype high-entropy carbide superconductors, the VEC is 4.2 for Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2C, and Ti0.2Nb0.2Ta0.2Mo0.2W0.2C1x N x (0 ≤ x ≤ 0.45) has a VEC ranging from 4.6 to 4.825.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
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“The observed increase in T c in NaCl-type high-entropy carbide superconductors is relatively less pronounced than that in crystalline alloys, exhibiting a monotonically increasing trend akin to that observed in amorphous superconductors.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
The cited source says what the claim attributes to it.
In the citing paper
“The highest T c of 6.03 K was observed for Ti0.2Nb0.2Ta0.2Mo0.2W0.2C0.7N0.3, with VEC = 4.75, which is also in agreement with the Matthias rule.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
The cited source says what the claim attributes to it.
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“In the Ti0.2Nb0.2Ta0.2Mo0.2W0.2C1x N x systems, the Dirac points will be farther from the Fermi level with increasing N content.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
The cited source says what the claim attributes to it.
In the citing paper
“Nontrivial electronic bands also exist in other high-entropy carbide superconductors, such as Ti0.2Zr0.2Nb0.2Ta0.2Mo0.2C and Ti0.2Nb0.2Ta0.2Mo0.2W0.2C1x N x (0 ≤ x ≤ 0.45) 45,46 .”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
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“The T c range is approximately 2 -8 K in BCC-type HEA superconductors.”
From Recent advances in high-entropy superconductors (2024) · cites this paper as [46]
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Metadata
- Authors
- Zeng, L., Hu, X., Zhou, Y., Liu, Y., Boswell, M., Xie, W., Li, K., Li, L., Yu, P., Zhang, C., Guo, W.-M., Yao, D.-X., & Luo, H.
- Affiliations
- Sun Yat-sen University (CN)
- Guangdong University of Technology (CN)
- Michigan State University (US)
- Corresponding author
- Yao, Dao-Xin
- Luo, Huixia
- ORCID
- Venue
- The Innovation Materials
- Publisher
- Innovation Press Co., Limited
- Published
- 2023
- Volume
- 1
- Issue
- 3
- Pages
- 100042
- ISSN
- 2959-8737 (ISSN-L)
- OpenAlex
- W4388930421
- Cited by
- 14
- References
- 45
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 4
- FWCI
- 1.38
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by
- Locations
- The Innovation Materials (publishedVersion, cc-by)
- Funders
- National Natural Science Foundation of China (NSFC-11974432, 11922415, 12274471, 11974432, 2018YFA0306001, 92165204, NSFC-92165204, NKRDPC-2018YFA0306001)
- National Key Research and Development Program of China (2018YFA0306001, NKRDPC-2022YFA1402802, NSFC-92165204, NKRDPC-2018YFA0306001, 2019B110209003, NSFC-11974432, 2022YFA1402802)
- Basic and Applied Basic Research Foundation of Guangdong Province (2019A1515011718, 2022A1515011168, NSFC-92165204, NKRDPC-2022YFA1402802, 2022B1212010008)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › High Entropy Alloys Studies
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Topological Materials and Phenomena
- Keywords
- high-entropy materials, superconductivity, topological band structure, Dirac point, electronic band structure, superconducting ceramics
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