Superconductivity in the High-Entropy Ceramics Ti_0.2Zr_0.2Nb_0.2Mo_0.2Ta_0.2C_x with Possible Nontrivial Band Topology

Zeng, Lingyong1; Hu, Xunwu2; Zhou, Yazhou3; Boubeche, Mebrouka4; Guo, Ruixin5,6; Liu, Yang7; Luo, Si-Chun7; Guo, Shu5,6; Li, Kuan1; Yu, Peifeng1; Zhang, Chao1; Guo, Wei-Ming7; Sun, Liling3; Yao, Dao-Xin2,6; Luo, Huixia1

2023-12-01

10.1002/advs.202305054

ADVANCED SCIENCE   影响因子和分区

2198-3844

Topological superconductors have drawn significant interest from the scientific community due to the accompanying Majorana fermions. Here, the discovery of electronic structure and superconductivity (SC) in high-entropy ceramics Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx (x = 1 and 0.8) combined with experiments and first-principles calculations is reported. The Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx high-entropy ceramics show bulk type-II SC with T-c approximate to 4.00 K (x = 1) and 2.65 K (x = 0.8), respectively. The specific heat jump (triangle C/gamma T-c) is equal to 1.45 (x = 1) and 1.52 (x = 0.8), close to the expected value of 1.43 for the BCS superconductor in the weak coupling limit. The high-pressure resistance measurements show a robust SC against high physical pressure in Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2C, with a slight T-c variation of 0.3 K within 82.5 GPa. Furthermore, the first-principles calculations indicate that the Dirac-like point exists in the electronic band structures of Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2C, which is potentially a topological superconductor. The Dirac-like point is mainly contributed by the d orbitals of transition metals M and the p orbitals of C. The high-entropy ceramics provide an excellent platform for the fabrication of novel quantum devices, and the study may spark significant future physics investigations in this intriguing material.

high-entropy ceramics high-pressure superconductivity topological superconductors

SCI ; EI

英语

其他

Guangdong Basic and Applied Basic Research Foundation["2022A1515011168","2019A1515011718"] ; Key Research & Development Program of Guangdong Province, China[2019B110209003] ; Foreign Young Talents Program of China[22KW041C211] ; National Key Research and Development Program of China[NKRDPC-2022YFA1403900] ; Leading Talent Program of Guangdong Special Projects[201626003] ; Shenzhen International Quantum Academy[SIQA202102] ; null[NSFC-22205091]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001113790000001

WILEY

20234915164118

Electronic structure ; Niobium compounds ; Superconducting materials ; Tantalum compounds ; Technetium ; Titanium compounds ; Topology ; Zirconium compounds

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Superconducting Materials:708.3 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

2-s2.0-85178492998

Web of Science

1.Sun Yat Sen Univ, Sch Mat Sci & Engn, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Magnetoelect Phys & Devices, 135 Xingang Xi Rd, Guangzhou 510275, Peoples R China
2.Sun Yat Sen Univ, Ctr Neutron Sci & Technol, Sch Phys, Guangdong Prov Key Lab Magnetoelect Phys & Devices, Guangzhou 510275, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.Songshan Lake Mat Lab, Bldg A1, Dongguan 523808, Guang Dong, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
6.Int Quantum Acad, Shenzhen 518048, Peoples R China
7.Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Peoples R China

Zeng, Lingyong,Hu, Xunwu,Zhou, Yazhou,et al. Superconductivity in the High-Entropy Ceramics Ti_0.2Zr_0.2Nb_0.2Mo_0.2Ta_0.2C_x with Possible Nontrivial Band Topology[J]. ADVANCED SCIENCE,2023,11(5).

Zeng, Lingyong.,Hu, Xunwu.,Zhou, Yazhou.,Boubeche, Mebrouka.,Guo, Ruixin.,...&Luo, Huixia.(2023).Superconductivity in the High-Entropy Ceramics Ti_0.2Zr_0.2Nb_0.2Mo_0.2Ta_0.2C_x with Possible Nontrivial Band Topology.ADVANCED SCIENCE,11(5).

Zeng, Lingyong,et al."Superconductivity in the High-Entropy Ceramics Ti_0.2Zr_0.2Nb_0.2Mo_0.2Ta_0.2C_x with Possible Nontrivial Band Topology".ADVANCED SCIENCE 11.5(2023).