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Title: Prediction of ambient pressure superconductivity in cubic ternary hydrides with MH6 octahedra

Journal Article · · Materials Today Physics
ORCiD logo [1];  [2];  [3];  [3];  [4];  [5];  [3];  [6];  [6]; ORCiD logo [3];  [2]
  1. Jimei Univ., Xiamen (China); Xiamen Univ. (China)
  2. Iowa State Univ., Ames, IA (United States)
  3. Xiamen Univ. (China)
  4. Jimei Univ., Xiamen (China)
  5. Guangdong University of Technology, Guangzhou (China)
  6. Ames Lab., and Iowa State Univ., Ames, IA (United States)

Exploring high-temperature superconducting (high-Tc) material at ambient pressure holds immense significance for physics, chemistry, and materials science. In this study, we perform a high-throughput screening of strong electron-phonon interactions in X2MH6 compounds (X = Li, Na, Mg, Al, K, Ca, Ga, Rb, Sr, and In; M are 3d, 4d, and 5d transition metals). These compounds have a cubic structure featuring an MH6 octahedron motif. Our screening calculations suggest that 26 compounds exhibit dynamic stability and strong electron-phonon coupling. Among them, Mg2RhH6, Mg2IrH6, Al2MnH6, and Li2CuH6 show promising energetic stability and Tc of more than 50 K at ambient pressure. This study underscores promising high-Tc compounds at ambient pressure with distinctive MH6 motifs.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)
Grant/Contract Number:
AC02-07CH11358; DMR2132666
OSTI ID:
2329490
Report Number(s):
IS-J-11,286
Journal Information:
Materials Today Physics, Vol. 42; ISSN 2542-5293
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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