High-entropy silicide superconductors with W5Si3-type structure

Article Nanoscience & Nanotechnology

Superconductivity with large upper critical field in noncentrosymmetric Cr-bearing high-entropy alloys

Guorui Xiao et al.

Summary: A series of new Cr5+xMo35xW12Re35Ru13C20 high-entropy alloys have been synthesized and characterized, showing bulk superconductivity. The lattice parameter and superconducting transition temperature vary with different compositions.

SCRIPTA MATERIALIA (2023)

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Article Nanoscience & Nanotechnology

A new type of compositionally complex M5Si3 silicides: Cation ordering and unexpected phase stability

Sashank Shivakumar et al.

Summary: A new type of compositionally complex silicides has been synthesized, demonstrating stable hexagonal gamma phase and cation ordering. This work expands the field of high entropy ceramics and shows potential for high-entropy counterparts to Nb-silicide and Mo-Si-B composites.

SCRIPTA MATERIALIA (2022)

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Article Nanoscience & Nanotechnology

What is in a name: Defining high entropy oxides

Matthew Brahlek et al.

Summary: High entropy oxides are an exciting new field that allows for the design of highly customized functional behaviors that do not have traditional counterparts. The study and application of these materials bring together scientists and engineers from different disciplines. Understanding a material's crystallinity, composition, and mixing length scales is critical in determining its true definition.

APL MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Strong-coupling superconductivity with Tc ∼ 10.8 K induced by P doping in the topological semimetal Mo5Si3

Bin-Bin Ruan et al.

Summary: By doping P into Mo5Si3, we discovered strong-coupling superconductivity in Mo5Si3-xPx. Mo5Si3 itself is not a superconductor, but upon P doping, Mo5Si3-xPx exhibits bulk superconductivity. Mo5Si1.5P1.5 has a Tc as high as 10.8 K, setting a new record among W5Si3-type superconductors. Mo5Si1.5P1.5 is a fully gapped superconductor with strong electron-phonon coupling.

SCIENCE CHINA-MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Superconductivity in the high-entropy alloy (NbTa)0.67(MoHfW )0.33

P. Sobota et al.

Summary: The structural and physical properties of the high-entropy alloy (NbTa)0.67(MoHfW)0.33 were investigated using experimental and theoretical methods. It was found that the alloy has a body-centered cubic structure and exhibits superconductivity at low temperatures.

PHYSICAL REVIEW B (2022)

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Article Chemistry, Inorganic & Nuclear

Strong enhancement of superconductivity in the topological transition metal silicide W5Si3 by Re doping

Jifeng Wu et al.

Summary: We investigated the effect of Re doping on the superconductivity of W5Si3 and found that Re substitution leads to an anisotropic lattice shrinkage and a significant enhancement of the superconducting critical temperature. The enhancement is attributed to the doping-induced phonon softening and the enhancement of electron-phonon coupling. Our study suggests that chemical doping is a convenient way to optimize the superconductivity in topological transition metal silicides.

INORGANIC CHEMISTRY FRONTIERS (2022)

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Article Materials Science, Multidisciplinary

High-Entropy Polyanionic Lithium Superionic Conductors

Florian Strauss et al.

Summary: This study reports on medium- and high-entropy polyanionic lithium superionic conductors crystallizing in the F-43m space group and adopting the argyrodite structure. The introduction of entropy marginally affects the room-temperature ionic conductivity, while lowering the activation energy for conduction.

ACS MATERIALS LETTERS (2022)

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Article Materials Science, Ceramics

High-entropy oxides based on valence combinations: design and practice

Lei Tang et al.

Summary: High-entropy oxides (HEOs) are a new class of materials with wide applications, and designing them requires consideration of geometric compatibility and electrical balance. Researchers have proposed a two-step strategy to systematically select constituent materials for making HEOs, successfully synthesizing single-phase cubic perovskites in multiple subsystems. This strategy is expected to be applicable to other oxide systems as well.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2021)

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Article Multidisciplinary Sciences

High-entropy-stabilized chalcogenides with high thermoelectric performance

Binbin Jiang et al.

Summary: By utilizing entropy-driven structural stabilization, we increased the figure of merit (zT) value to 1.8 in an n-type PbSe-based high-entropy material at 900 kelvin, showcasing a promising method to enhance the performance of thermoelectric materials.

SCIENCE (2021)

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Editorial Material Materials Science, Multidisciplinary

High Entropy Materials: Challenges and Prospects

Peter K. Liaw et al.

METALS (2021)

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Review Materials Science, Ceramics

High-entropy ceramics: Present status, challenges, and a look forward

Huimin Xiang et al.

Summary: High-entropy ceramics are solid solutions of inorganic compounds with diverse crystal and electronic structures, providing large space for property tuning through band structure and phonon engineering. In addition to traditional strengthening, hardening, and low thermal conductivity, HECs exhibit new properties such as colossal dielectric constant and super ionic conductivity. Challenges in processing, characterization, and property predictions are highlighted, along with future directions for material exploration and in-depth characterization.

JOURNAL OF ADVANCED CERAMICS (2021)

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Article Materials Science, Multidisciplinary

Structural evolution and superconductivity tuned by valence electron concentration in the Nb-Mo-Re-Ru-Rh high-entropy alloys

Bin Liu et al.

Summary: The crystal structure and physical properties of two different types of high-entropy alloys have been studied, both showing superconducting behavior with a decreasing critical transition temperature as the valence electron concentration increases. The hcp structured high-entropy alloys exhibit higher superconducting transition temperatures compared to their alpha-Mn counterparts.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

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Review Materials Science, Multidisciplinary

High-entropy carbide ceramics: a perspective review

Zhe Wang et al.

Summary: The review highlights the need for integrated efforts in identifying single-phase formation rules, establishing rapid compositional design predictive models, and studying the synthesis principles of HECC materials. Mechanistic understandings of mechanical, oxidation, and thermal conduction behaviors of HECC materials are also crucial for improving their design and fabrication.

TUNGSTEN (2021)

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Review Chemistry, Multidisciplinary

High-entropy energy materials: challenges and new opportunities

Yanjiao Ma et al.

Summary: The essential demand for functional materials enabling the realization of new energy technologies has driven significant efforts in scientific and industrial research. High-entropy materials, with their unique structural characteristics and tunable functional properties, have gained increasing interest in the fields of environmental science and renewable energy technology. Effective strategies for designing high-entropy materials from computational techniques and experimental aspects provide researchers with guidance on potential advantages and remaining challenges.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Review Chemistry, Physical

Recent progress of high-entropy materials for energy storage and conversion

Azadeh Amiri et al.

Summary: The emergence of high-entropy materials has shown superior performance in energy conversion and storage applications, with higher electrocatalytic activities, cycling stability, and durability compared to traditional noble metal catalysts.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Physical

Recent progress of high-entropy materials for energy storage and conversion

Azadeh Amiri et al.

Summary: The emergence of high-entropy materials with their superior electrocatalytic and catalytic activities, as well as long cycling stability and durability, has led to new advancements in energy storage and conversion technologies.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Nanoscience & Nanotechnology