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Cited by 34High Entropy Alloys StudiesPhysics of Superconductivity and MagnetismHeusler alloys: electronic and magnetic properties

Superconductivity in the bcc‐Type High‐Entropy Alloy TiHfNbTaMo

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Zeng, Lingyong, Zhan, Jie, Boubeche, Mebrouka, Li, Kuan, Li, Longfu, Yu, Peifeng, Wang, Kangwang, Zhang, Chao +3 more·2023·Advanced Quantum Technologies
DOI 10.1002/qute.202300213
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Abstract

X‐ray powder diffraction, electrical resistivity, magnetization, and thermodynamic measurements are conducted to investigate the structure and superconducting properties of TiHfNbTaMo, a novel high‐entropy alloy possessing a valence electron count (VEC) of 4.8. The TiHfNbTaMo HEA is discovered to have a body‐centered cubic structure (space group ) with lattice parameters a = 3.445 (1) Å and a microscopically homogeneous distribution of the constituent elements. This material shows type‐II superconductivity with T c = 3.42 K, lower critical field µ 0 H c1 (0) = 22.8 mT, and upper critical field µ 0 H c2 (0) = 3.95 T. Low‐temperature specific heat measurements show that the alloy is a conventional s‐wave type with a moderately coupled superconductor. First‐principles calculations show that the density of states (DOS) of the TiHfNbTaMo alloy is dominated by hybrid d orbitals of these five metal elements. Additionally, the TiHfNbTaMo HEA exhibits three van Hove singularities. Furthermore, the VEC and the composition of the elements (especially the Nb elemental content) affect the T c of the bcc‐type HEA.

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  • The VEC of BCC-type HEA superconductors significantly influences both their superconducting Tc and material stability.

    “Studies have revealed that the VEC of BCC-type HEA superconductors signi fi cantly in fl uences both their superconducting T c and material stability 7,23 .”

    From Recent advances in high-entropy superconductors (2024) · cites this paper as [23]

    The Results and Discussion and Conclusion state that VEC, together with elemental composition, affects the Tc of bcc-type HEA superconductors. The Introduction mentions structural stability as a property of HEAs, but our copy does not link material stability to VEC; that part of the claim is unsupported. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

  • In BCC-type HEA superconductors, the content of Nb has a significant influence on the Tc, with a higher Nb content possibly resulting in a higher Tc.

    “In BCC-type HEA superconductors, the content of Nb has a signi fi cant in fl uence on the T c, with a higher Nb content possibly resulting in a higher T c 23 .”

    From Recent advances in high-entropy superconductors (2024) · cites this paper as [23]

  • The presence of Nb significantly increases the Tc with the same VEC in BCC-type HEA superconductors.

    “The presence of Nb signi fi cantly increases the T c with the same VEC in BCC-type HEA superconductors.”

    From Recent advances in high-entropy superconductors (2024) · cites this paper as [23]

  • The Nb content in BCC-type HEAs is typically 25% or higher when the Tc is > 7 K.

    “The Nb content in BCC-type HEAs is typically 25% or higher when the T c is > 7 K 6,9,12,13,23,71 .”

    From Recent advances in high-entropy superconductors (2024) · cites this paper as [23]

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Cited by

Sorted by citations

Authors
Zeng, L., Zhan, J., Boubeche, M., Li, K., Li, L., Yu, P., Wang, K., Zhang, C., Jin, K., Sun, Y., & Luo, H.
Affiliations
  • Sun Yat-sen University (CN)
  • University of Science and Technology of China (CN)
  • Songshan Lake Materials Laboratory (CN)
  • Chinese Academy of Sciences (CN)
Corresponding author
Luo, Huixia
ORCID
Venue
Advanced Quantum Technologies
Publisher
Wiley
Published
2023-09-27
Volume
6
Issue
12
ISSN
2511-9044 (ISSN-L)
DOI
10.1002/qute.202300213
OpenAlex
W4387102122
Cited by
34
References
8
Citations by year
2026: 12 · 2025: 15 · 2024: 7
FWCI
3.35
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
  • Advanced Quantum Technologies (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
National Natural Science Foundation of China (12274471, 11922415, 11974432, 52271016, 52188101)
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 › Materials Science › Electronic, Optical and Magnetic Materials › Heusler alloys: electronic and magnetic properties
Keywords
high-entropy alloys, superconductivity, bcc structure, type-II superconductivity, critical magnetic field, specific heat, s-wave pairing, density of states, van Hove singularity, valence electron count, Nb content, superconducting transition temperature

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