journal article·2023-10Open access

Discovery of the High‐Entropy Carbide Ceramic Topological Superconductor Candidate (Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C

Lingyong Zeng, Zequan Wang, Jing Song, Gaoting Lin, Ruixin Guo, Si‐Chun Luo, Shu Guo, Kuan Li, Peifeng Yu, Chao Zhang, Wei‐Ming Guo, Jie Ma, Yusheng Hou, Huixia Luo

Advanced Functional Materials· Volume 33· Issue 40

Abstract

Abstract High‐entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near‐equal atomic ratios of multi‐principal elements. Material design and property tailoring possibilities emerge from this new class of materials. Herein, the discovery of superconductivity 2.35 K and topological properties in the (Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C high‐entropy carbide ceramic (HECC) is reported, which is not observed before in any of the investigated HECC. Density functional theory calculations show that six type‐II Dirac points exist in (Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C, which mainly contributed from the t2g orbitals of transition metals and the p orbitals of C. Due to the stability of the structure, robust superconductivity (SC) under pressure in this HEC superconductor is also observed. This study expands the physical properties of HECs, which may become a new material platform for SC research, especially for studying the coupling between SC and topological physics.
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Research context

OpenAlex topics: High Entropy Alloys Studies · Advanced materials and composites · Metal and Thin Film Mechanics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technologies Key Lab of Polymer Composite & Functional Materials Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Sun Yat‐Sen University Guangzhou 510275 China

Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Center for Neutron Science and Technology School of Physics Sun Yat‐Sen University Guangzhou 510275 China

Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Key Laboratory of Artificial Structures and Quantum Control School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China

Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

International Quantum Academy Shenzhen 518048 China

School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 China

Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China

Collaborative Innovation Center of Advanced Microstructures Nanjing University Hankou Road 22 Nanjing 210093 China

Funding

National Natural Science Foundation of China

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